140223440 has 80 divisors (see below), whose sum is σ = 374499840. Its totient is φ = 47831040.

The previous prime is 140223431. The next prime is 140223449. The reversal of 140223440 is 44322041.

It is an interprime number because it is at equal distance from previous prime (140223431) and next prime (140223449).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×140223440² = 39325226250867200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140223449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134441 + ... + 135479.

It is an arithmetic number, because the mean of its divisors is an integer number (4681248).

Almost surely, 2^140223440 is an apocalyptic number.

140223440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140223440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187249920).

140223440 is an abundant number, since it is smaller than the sum of its proper divisors (234276400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140223440 is a wasteful number, since it uses less digits than its factorization.

140223440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 140223440 is about 11841.5978651532. The cubic root of 140223440 is about 519.5255040414.

Adding to 140223440 its reverse (44322041), we get a palindrome (184545481).

It can be divided in two parts, 1402 and 23440, that added together give a palindrome (24842).

The spelling of 140223440 in words is "one hundred forty million, two hundred twenty-three thousand, four hundred forty".