401520556 has 24 divisors (see below), whose sum is σ = 727461504. Its totient is φ = 193712640.

The previous prime is 401520523. The next prime is 401520557. The reversal of 401520556 is 655025104.

It is a super-2 number, since 2×401520556² = 322437513781098272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401520557) 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, 39186 + ... + 48358.

It is an arithmetic number, because the mean of its divisors is an integer number (30310896).

Almost surely, 2^401520556 is an apocalyptic number.

It is an amenable number.

401520556 is a deficient number, since it is larger than the sum of its proper divisors (325940948).

401520556 is a wasteful number, since it uses less digits than its factorization.

401520556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9561 (or 9559 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 401520556 is about 20037.9778420878. The cubic root of 401520556 is about 737.7387485570.

The spelling of 401520556 in words is "four hundred one million, five hundred twenty thousand, five hundred fifty-six".