31253428 has 12 divisors (see below), whose sum is σ = 54834052. Its totient is φ = 15586560.

The previous prime is 31253413. The next prime is 31253437. The reversal of 31253428 is 82435213.

It can be written as a sum of positive squares in 2 ways, for example, as 27164944 + 4088484 = 5212^2 + 2022^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31253396 and 31253405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8253 + ... + 11428.

Almost surely, 2^31253428 is an apocalyptic number.

It is an amenable number.

31253428 is a deficient number, since it is larger than the sum of its proper divisors (23580624).

31253428 is a wasteful number, since it uses less digits than its factorization.

31253428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20082 (or 20080 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 31253428 is about 5590.4765449825. The cubic root of 31253428 is about 314.9917794109.

The spelling of 31253428 in words is "thirty-one million, two hundred fifty-three thousand, four hundred twenty-eight".