31672880 has 40 divisors (see below), whose sum is σ = 73877712. Its totient is φ = 12628224.

The previous prime is 31672871. The next prime is 31672889. The reversal of 31672880 is 8827613.

It is an interprime number because it is at equal distance from previous prime (31672871) and next prime (31672889).

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 31672880.

It is not an unprimeable number, because it can be changed into a prime (31672889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41462 + ... + 42218.

Almost surely, 2^31672880 is an apocalyptic number.

It is an amenable number.

31672880 is an abundant number, since it is smaller than the sum of its proper divisors (42204832).

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

31672880 is a wasteful number, since it uses less digits than its factorization.

31672880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 31672880 is about 5627.8663807877. The cubic root of 31672880 is about 316.3946892174.

The spelling of 31672880 in words is "thirty-one million, six hundred seventy-two thousand, eight hundred eighty".