401540520 has 64 divisors (see below), whose sum is σ = 1243491840. Its totient is φ = 103622400.

The previous prime is 401540519. The next prime is 401540533. The reversal of 401540520 is 25045104.

It is a super-2 number, since 2×401540520² = 322469578403740800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50251 + ... + 57690.

It is an arithmetic number, because the mean of its divisors is an integer number (19429560).

Almost surely, 2^401540520 is an apocalyptic number.

401540520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401540520 is an abundant number, since it is smaller than the sum of its proper divisors (841951320).

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

401540520 is a wasteful number, since it uses less digits than its factorization.

401540520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107986 (or 107982 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 401540520 is about 20038.4759899549. The cubic root of 401540520 is about 737.7509753883.

Adding to 401540520 its reverse (25045104), we get a palindrome (426585624).

The spelling of 401540520 in words is "four hundred one million, five hundred forty thousand, five hundred twenty".