401820204 has 24 divisors (see below), whose sum is σ = 938347200. Its totient is φ = 133830544.

The previous prime is 401820197. The next prime is 401820217. The reversal of 401820204 is 402028104.

It is a super-2 number, since 2×401820204² = 322918952685203232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347 + ... + 28445.

It is an arithmetic number, because the mean of its divisors is an integer number (39097800).

Almost surely, 2^401820204 is an apocalyptic number.

It is an amenable number.

401820204 is an abundant number, since it is smaller than the sum of its proper divisors (536526996).

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

401820204 is a wasteful number, since it uses less digits than its factorization.

401820204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27389 (or 27387 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 401820204 is about 20045.4534495980. The cubic root of 401820204 is about 737.9222235733.

Adding to 401820204 its reverse (402028104), we get a palindrome (803848308).

The spelling of 401820204 in words is "four hundred one million, eight hundred twenty thousand, two hundred four".