400788672 has 56 divisors (see below), whose sum is σ = 1061898816. Its totient is φ = 133410048.

The previous prime is 400788649. The next prime is 400788683. The reversal of 400788672 is 276887004.

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, 245523 + ... + 247149.

Almost surely, 2^400788672 is an apocalyptic number.

It is an amenable number.

400788672 is an abundant number, since it is smaller than the sum of its proper divisors (661110144).

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

400788672 is a wasteful number, since it uses less digits than its factorization.

400788672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925 (or 2915 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 400788672 is about 20019.7070907643. The cubic root of 400788672 is about 737.2902305634.

The spelling of 400788672 in words is "four hundred million, seven hundred eighty-eight thousand, six hundred seventy-two".