140440520 has 32 divisors (see below), whose sum is σ = 344718720. Its totient is φ = 51069120.

The previous prime is 140440501. The next prime is 140440529. The reversal of 140440520 is 25044041.

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

It is a junction number, because it is equal to n+sod(n) for n = 140440492 and 140440501.

It is not an unprimeable number, because it can be changed into a prime (140440529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159152 + ... + 160031.

It is an arithmetic number, because the mean of its divisors is an integer number (10772460).

Almost surely, 2^140440520 is an apocalyptic number.

140440520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140440520 is an abundant number, since it is smaller than the sum of its proper divisors (204278200).

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

140440520 is a wasteful number, since it uses less digits than its factorization.

140440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319205 (or 319201 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 140440520 is about 11850.7603131613. The cubic root of 140440520 is about 519.7934584074.

Adding to 140440520 its reverse (25044041), we get a palindrome (165484561).

The spelling of 140440520 in words is "one hundred forty million, four hundred forty thousand, five hundred twenty".