31872472 has 16 divisors (see below), whose sum is σ = 60310800. Its totient is φ = 15789600.

The previous prime is 31872461. The next prime is 31872473. The reversal of 31872472 is 27427813.

It is a super-3 number, since 3×31872472³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31872473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17404 + ... + 19147.

It is an arithmetic number, because the mean of its divisors is an integer number (3769425).

Almost surely, 2^31872472 is an apocalyptic number.

It is an amenable number.

31872472 is a deficient number, since it is larger than the sum of its proper divisors (28438328).

31872472 is a wasteful number, since it uses less digits than its factorization.

31872472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36666 (or 36662 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 31872472 is about 5645.5710074358. The cubic root of 31872472 is about 317.0579028927.

The spelling of 31872472 in words is "thirty-one million, eight hundred seventy-two thousand, four hundred seventy-two".