400165632 has 54 divisors (see below), whose sum is σ = 1153782812. Its totient is φ = 133387776.

The previous prime is 400165603. The next prime is 400165651. The reversal of 400165632 is 236561004.

400165632 is a `hidden beast` number, since 4 + 0 + 0 + 1 + 656 + 3 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 400165596 and 400165605.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84538 + ... + 89145.

Almost surely, 2^400165632 is an apocalyptic number.

It is an amenable number.

400165632 is an abundant number, since it is smaller than the sum of its proper divisors (753617180).

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

400165632 is a wasteful number, since it uses less digits than its factorization.

400165632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173705 (or 173688 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 400165632 is about 20004.1403714331. The cubic root of 400165632 is about 736.9079846117.

The spelling of 400165632 in words is "four hundred million, one hundred sixty-five thousand, six hundred thirty-two".