31980684 has 12 divisors (see below), whose sum is σ = 74621624. Its totient is φ = 10660224.

The previous prime is 31980673. The next prime is 31980719. The reversal of 31980684 is 48608913.

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

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, 1332517 + ... + 1332540.

Almost surely, 2^31980684 is an apocalyptic number.

It is an amenable number.

31980684 is an abundant number, since it is smaller than the sum of its proper divisors (42640940).

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

31980684 is a wasteful number, since it uses less digits than its factorization.

31980684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665064 (or 2665062 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 31980684 is about 5655.1466824478. The cubic root of 31980684 is about 317.4163178722.

It can be divided in two parts, 319 and 80684, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 31980684 in words is "thirty-one million, nine hundred eighty thousand, six hundred eighty-four".