401520204 has 36 divisors (see below), whose sum is σ = 1015562184. Its totient is φ = 133759872.

The previous prime is 401520191. The next prime is 401520211. The reversal of 401520204 is 402025104.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×401520204² = 322436948440403232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114079 + ... + 117545.

Almost surely, 2^401520204 is an apocalyptic number.

It is an amenable number.

401520204 is an abundant number, since it is smaller than the sum of its proper divisors (614041980).

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

401520204 is a wasteful number, since it uses less digits than its factorization.

401520204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6694 (or 6689 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 401520204 is about 20037.9690587644. The cubic root of 401520204 is about 737.7385329731.

Adding to 401520204 its reverse (402025104), we get a palindrome (803545308).

The spelling of 401520204 in words is "four hundred one million, five hundred twenty thousand, two hundred four".