31649136 has 40 divisors (see below), whose sum is σ = 86065920. Its totient is φ = 9994176.

The previous prime is 31649113. The next prime is 31649141. The reversal of 31649136 is 63194613.

It is a junction number, because it is equal to n+sod(n) for n = 31649097 and 31649106.

It is a congruent number.

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, 16440 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (2151648).

Almost surely, 2^31649136 is an apocalyptic number.

It is an amenable number.

31649136 is an abundant number, since it is smaller than the sum of its proper divisors (54416784).

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

31649136 is a wasteful number, since it uses less digits than its factorization.

31649136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34733 (or 34727 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 31649136 is about 5625.7564824653. The cubic root of 31649136 is about 316.3156062758.

The spelling of 31649136 in words is "thirty-one million, six hundred forty-nine thousand, one hundred thirty-six".