401552520 has 64 divisors (see below), whose sum is σ = 1207941120. Its totient is φ = 106788864.

The previous prime is 401552491. The next prime is 401552581. The reversal of 401552520 is 25255104.

It is a happy number.

It is a super-2 number, since 2×401552520² = 322488852636700800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 41592 + ... + 50328.

It is an arithmetic number, because the mean of its divisors is an integer number (18874080).

Almost surely, 2^401552520 is an apocalyptic number.

401552520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401552520 is an abundant number, since it is smaller than the sum of its proper divisors (806388600).

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

401552520 is a wasteful number, since it uses less digits than its factorization.

401552520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134 (or 9130 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 401552520 is about 20038.7754116862. The cubic root of 401552520 is about 737.7583245208.

The spelling of 401552520 in words is "four hundred one million, five hundred fifty-two thousand, five hundred twenty".