401451864 has 48 divisors (see below), whose sum is σ = 1103171160. Its totient is φ = 121651200.

The previous prime is 401451859. The next prime is 401451881. The reversal of 401451864 is 468154104.

It is a super-2 number, since 2×401451864² = 322327198218148992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 66217 + ... + 72024.

Almost surely, 2^401451864 is an apocalyptic number.

401451864 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

401451864 is an abundant number, since it is smaller than the sum of its proper divisors (701719296).

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

401451864 is a wasteful number, since it uses less digits than its factorization.

401451864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138272 (or 138257 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 401451864 is about 20036.2637235588. The cubic root of 401451864 is about 737.6966754596.

The spelling of 401451864 in words is "four hundred one million, four hundred fifty-one thousand, eight hundred sixty-four".