31228484 has 36 divisors (see below), whose sum is σ = 63910224. Its totient is φ = 13312656.

The previous prime is 31228469. The next prime is 31228537. The reversal of 31228484 is 48482213.

It is a self number, because there is not a number n which added to its sum of digits gives 31228484.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55187 + ... + 55749.

It is an arithmetic number, because the mean of its divisors is an integer number (1775284).

Almost surely, 2^31228484 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31228484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31955112).

31228484 is an abundant number, since it is smaller than the sum of its proper divisors (32681740).

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

31228484 is a wasteful number, since it uses less digits than its factorization.

31228484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 855 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 31228484 is about 5588.2451628396. The cubic root of 31228484 is about 314.9079566465.

The spelling of 31228484 in words is "thirty-one million, two hundred twenty-eight thousand, four hundred eighty-four".