31128714 has 12 divisors (see below), whose sum is σ = 67445586. Its totient is φ = 10376232.

The previous prime is 31128709. The next prime is 31128731. The reversal of 31128714 is 41782113.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 8803089 = 4725^2 + 2967^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 864669 + ... + 864704.

Almost surely, 2^31128714 is an apocalyptic number.

31128714 is an abundant number, since it is smaller than the sum of its proper divisors (36316872).

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

31128714 is a wasteful number, since it uses less digits than its factorization.

31128714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729381 (or 1729378 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 31128714 is about 5579.3112478155. The cubic root of 31128714 is about 314.5722387249.

The spelling of 31128714 in words is "thirty-one million, one hundred twenty-eight thousand, seven hundred fourteen".