140242440 has 64 divisors (see below), whose sum is σ = 453096000. Its totient is φ = 34520832.

The previous prime is 140242433. The next prime is 140242441. The reversal of 140242440 is 44242041.

It is a super-3 number, since 3×140242440³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (140242441) 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, 43390 + ... + 46509.

It is an arithmetic number, because the mean of its divisors is an integer number (7079625).

Almost surely, 2^140242440 is an apocalyptic number.

140242440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140242440 is an abundant number, since it is smaller than the sum of its proper divisors (312853560).

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

140242440 is a wasteful number, since it uses less digits than its factorization.

140242440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89926 (or 89922 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 140242440 is about 11842.4000945754. The cubic root of 140242440 is about 519.5489678760.

Adding to 140242440 its reverse (44242041), we get a palindrome (184484481).

The spelling of 140242440 in words is "one hundred forty million, two hundred forty-two thousand, four hundred forty".