31300428 has 12 divisors (see below), whose sum is σ = 73034360. Its totient is φ = 10433472.

The previous prime is 31300427. The next prime is 31300433. The reversal of 31300428 is 82400313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31300427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304173 + ... + 1304196.

Almost surely, 2^31300428 is an apocalyptic number.

It is an amenable number.

31300428 is an abundant number, since it is smaller than the sum of its proper divisors (41733932).

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

31300428 is a wasteful number, since it uses less digits than its factorization.

31300428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608376 (or 2608374 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 31300428 is about 5594.6785430443. The cubic root of 31300428 is about 315.1495988837.

The spelling of 31300428 in words is "thirty-one million, three hundred thousand, four hundred twenty-eight".