31300038 has 72 divisors (see below), whose sum is σ = 85232784. Its totient is φ = 8125920.

The previous prime is 31300021. The next prime is 31300067. The reversal of 31300038 is 83000313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14220 + ... + 16272.

Almost surely, 2^31300038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31300038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42616392).

31300038 is an abundant number, since it is smaller than the sum of its proper divisors (53932746).

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

31300038 is a wasteful number, since it uses less digits than its factorization.

31300038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31300038 is about 5594.6436883862. The cubic root of 31300038 is about 315.1482899682.

The spelling of 31300038 in words is "thirty-one million, three hundred thousand, thirty-eight".