400087312 has 40 divisors (see below), whose sum is σ = 794699136. Its totient is φ = 195037056.

The previous prime is 400087309. The next prime is 400087381. The reversal of 400087312 is 213780004.

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, 229998 + ... + 231730.

Almost surely, 2^400087312 is an apocalyptic number.

It is an amenable number.

400087312 is a deficient number, since it is larger than the sum of its proper divisors (394611824).

400087312 is a wasteful number, since it uses less digits than its factorization.

400087312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2089 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400087312 is about 20002.1826808976. The cubic root of 400087312 is about 736.8599058543.

The spelling of 400087312 in words is "four hundred million, eighty-seven thousand, three hundred twelve".