31679436 has 12 divisors (see below), whose sum is σ = 73918712. Its totient is φ = 10559808.

The previous prime is 31679423. The next prime is 31679467. The reversal of 31679436 is 63497613.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31679394 and 31679403.

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, 1319965 + ... + 1319988.

Almost surely, 2^31679436 is an apocalyptic number.

It is an amenable number.

31679436 is an abundant number, since it is smaller than the sum of its proper divisors (42239276).

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

31679436 is a wasteful number, since it uses less digits than its factorization.

31679436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639960 (or 2639958 counting only the distinct ones).

The product of its digits is 81648, while the sum is 39.

The square root of 31679436 is about 5628.4488093968. The cubic root of 31679436 is about 316.4165179920.

The spelling of 31679436 in words is "thirty-one million, six hundred seventy-nine thousand, four hundred thirty-six".