31734972 has 18 divisors (see below), whose sum is σ = 80219048. Its totient is φ = 10578312.

The previous prime is 31734931. The next prime is 31734977. The reversal of 31734972 is 27943713.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 881527 = 31734972 / (3 + 1 + 7 + 3 + 4 + 9 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31734977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440728 + ... + 440799.

Almost surely, 2^31734972 is an apocalyptic number.

It is an amenable number.

31734972 is an abundant number, since it is smaller than the sum of its proper divisors (48484076).

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

31734972 is a wasteful number, since it uses less digits than its factorization.

31734972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881537 (or 881532 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 31734972 is about 5633.3801575963. The cubic root of 31734972 is about 316.6013092572.

The spelling of 31734972 in words is "thirty-one million, seven hundred thirty-four thousand, nine hundred seventy-two".