31427632 has 20 divisors (see below), whose sum is σ = 61283776. Its totient is φ = 15612480.

The previous prime is 31427629. The next prime is 31427639. The reversal of 31427632 is 23672413.

It is a self number, because there is not a number n which added to its sum of digits gives 31427632.

It is not an unprimeable number, because it can be changed into a prime (31427639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3744 + ... + 8767.

Almost surely, 2^31427632 is an apocalyptic number.

It is an amenable number.

31427632 is a deficient number, since it is larger than the sum of its proper divisors (29856144).

31427632 is a wasteful number, since it uses less digits than its factorization.

31427632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12676 (or 12670 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The square root of 31427632 is about 5606.0353191895. The cubic root of 31427632 is about 315.5759413604.

The spelling of 31427632 in words is "thirty-one million, four hundred twenty-seven thousand, six hundred thirty-two".