31119928 has 64 divisors (see below), whose sum is σ = 71547840. Its totient is φ = 12386304.

The previous prime is 31119919. The next prime is 31119941. The reversal of 31119928 is 82991113.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 31119893 and 31119902.

It is a congruent number.

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, 92176 + ... + 92512.

It is an arithmetic number, because the mean of its divisors is an integer number (1117935).

Almost surely, 2^31119928 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 31119928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35773920).

31119928 is an abundant number, since it is smaller than the sum of its proper divisors (40427912).

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

31119928 is a wasteful number, since it uses less digits than its factorization.

31119928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 460 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 31119928 is about 5578.5238190762. The cubic root of 31119928 is about 314.5426402032.

The spelling of 31119928 in words is "thirty-one million, one hundred nineteen thousand, nine hundred twenty-eight".