401921808 has 40 divisors (see below), whose sum is σ = 1039109088. Its totient is φ = 133869312.

The previous prime is 401921771. The next prime is 401921813. The reversal of 401921808 is 808129104.

It is a super-2 number, since 2×401921808² = 323082279491977728, 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, 81460 + ... + 86252.

Almost surely, 2^401921808 is an apocalyptic number.

401921808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

401921808 is an abundant number, since it is smaller than the sum of its proper divisors (637187280).

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

401921808 is a wasteful number, since it uses less digits than its factorization.

401921808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551 (or 6545 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 401921808 is about 20047.9876296849. The cubic root of 401921808 is about 737.9844151790.

The spelling of 401921808 in words is "four hundred one million, nine hundred twenty-one thousand, eight hundred eight".