140523440 has 40 divisors (see below), whose sum is σ = 329093520. Its totient is φ = 55800576.

The previous prime is 140523437. The next prime is 140523451. The reversal of 140523440 is 44325041.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4802 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (8227338).

Almost surely, 2^140523440 is an apocalyptic number.

140523440 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 140523440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164546760).

140523440 is an abundant number, since it is smaller than the sum of its proper divisors (188570080).

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

140523440 is a wasteful number, since it uses less digits than its factorization.

140523440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12789 (or 12783 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 140523440 is about 11854.2583066171. The cubic root of 140523440 is about 519.8957384655.

Adding to 140523440 its reverse (44325041), we get a palindrome (184848481).

The spelling of 140523440 in words is "one hundred forty million, five hundred twenty-three thousand, four hundred forty".