40040520 has 64 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 9855744.

The previous prime is 40040513. The next prime is 40040531. The reversal of 40040520 is 2504004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40040520.

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 15 ways as a sum of consecutive naturals, for example, 11274 + ... + 14393.

It is an arithmetic number, because the mean of its divisors is an integer number (2021355).

Almost surely, 2^40040520 is an apocalyptic number.

40040520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040520 is an abundant number, since it is smaller than the sum of its proper divisors (89326200).

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

40040520 is a wasteful number, since it uses less digits than its factorization.

40040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25694 (or 25690 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40040520 is about 6327.7578967593. The cubic root of 40040520 is about 342.1106307390.

Adding to 40040520 its reverse (2504004), we get a palindrome (42544524).

The spelling of 40040520 in words is "forty million, forty thousand, five hundred twenty".