31228568 has 32 divisors (see below), whose sum is σ = 67620000. Its totient is φ = 13243392.

The previous prime is 31228537. The next prime is 31228573. The reversal of 31228568 is 86582213.

It is a congruent number.

It is an unprimeable number.

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, 2558 + ... + 8306.

It is an arithmetic number, because the mean of its divisors is an integer number (2113125).

Almost surely, 2^31228568 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 31228568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33810000).

31228568 is an abundant number, since it is smaller than the sum of its proper divisors (36391432).

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

31228568 is a wasteful number, since it uses less digits than its factorization.

31228568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5859 (or 5855 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 31228568 is about 5588.2526786107. The cubic root of 31228568 is about 314.9082389982.

The spelling of 31228568 in words is "thirty-one million, two hundred twenty-eight thousand, five hundred sixty-eight".