31438772 has 12 divisors (see below), whose sum is σ = 55134240. Its totient is φ = 15686136.

The previous prime is 31438739. The next prime is 31438783. The reversal of 31438772 is 27783413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6122 + ... + 10017.

It is an arithmetic number, because the mean of its divisors is an integer number (4594520).

Almost surely, 2^31438772 is an apocalyptic number.

It is an amenable number.

31438772 is a deficient number, since it is larger than the sum of its proper divisors (23695468).

31438772 is a wasteful number, since it uses less digits than its factorization.

31438772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630 (or 16628 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 31438772 is about 5607.0288032076. The cubic root of 31438772 is about 315.6132238458.

The spelling of 31438772 in words is "thirty-one million, four hundred thirty-eight thousand, seven hundred seventy-two".