31128048 has 60 divisors (see below), whose sum is σ = 99563568. Its totient is φ = 8893440.

The previous prime is 31128047. The next prime is 31128059. The reversal of 31128048 is 84082113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31128043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14433 + ... + 16448.

Almost surely, 2^31128048 is an apocalyptic number.

It is an amenable number.

31128048 is an abundant number, since it is smaller than the sum of its proper divisors (68435520).

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

31128048 is a wasteful number, since it uses less digits than its factorization.

31128048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30902 (or 30893 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 31128048 is about 5579.2515627098. The cubic root of 31128048 is about 314.5699952807.

The spelling of 31128048 in words is "thirty-one million, one hundred twenty-eight thousand, forty-eight".