400401232 has 40 divisors (see below), whose sum is σ = 967205952. Its totient is φ = 156000000.

The previous prime is 400401229. The next prime is 400401247. The reversal of 400401232 is 232104004.

It is a super-2 number, since 2×400401232² = 320642293174235648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 161269 + ... + 163732.

Almost surely, 2^400401232 is an apocalyptic number.

It is an amenable number.

400401232 is an abundant number, since it is smaller than the sum of its proper divisors (566804720).

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

400401232 is a wasteful number, since it uses less digits than its factorization.

400401232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325027 (or 325021 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400401232 is about 20010.0282858371. The cubic root of 400401232 is about 737.0525759559.

Adding to 400401232 its reverse (232104004), we get a palindrome (632505236).

The spelling of 400401232 in words is "four hundred million, four hundred one thousand, two hundred thirty-two".