31430672 has 40 divisors (see below), whose sum is σ = 74953536. Its totient is φ = 12433536.

The previous prime is 31430669. The next prime is 31430681. The reversal of 31430672 is 27603413.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 9338 + ... + 12249.

Almost surely, 2^31430672 is an apocalyptic number.

It is an amenable number.

31430672 is an abundant number, since it is smaller than the sum of its proper divisors (43522864).

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

31430672 is a wasteful number, since it uses less digits than its factorization.

31430672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21615 (or 21609 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 31430672 is about 5606.3064489912. The cubic root of 31430672 is about 315.5861162699.

The spelling of 31430672 in words is "thirty-one million, four hundred thirty thousand, six hundred seventy-two".