31628364 has 48 divisors (see below), whose sum is σ = 78599808. Its totient is φ = 9864448.

The previous prime is 31628353. The next prime is 31628371. The reversal of 31628364 is 46382613.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45967 + ... + 46649.

It is an arithmetic number, because the mean of its divisors is an integer number (1637496).

Almost surely, 2^31628364 is an apocalyptic number.

31628364 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31628364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39299904).

31628364 is an abundant number, since it is smaller than the sum of its proper divisors (46971444).

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

31628364 is a wasteful number, since it uses less digits than its factorization.

31628364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 932 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 31628364 is about 5623.9100277298. The cubic root of 31628364 is about 316.2463895811.

It can be divided in two parts, 316 and 28364, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 31628364 in words is "thirty-one million, six hundred twenty-eight thousand, three hundred sixty-four".