31290048 has 42 divisors (see below), whose sum is σ = 89688924. Its totient is φ = 10429824.

The previous prime is 31290029. The next prime is 31290059. The reversal of 31290048 is 84009213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26586 + ... + 27737.

Almost surely, 2^31290048 is an apocalyptic number.

It is an amenable number.

31290048 is an abundant number, since it is smaller than the sum of its proper divisors (58398876).

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

31290048 is a wasteful number, since it uses less digits than its factorization.

31290048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54341 (or 54328 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 31290048 is about 5593.7507988826. The cubic root of 31290048 is about 315.1147578850.

The spelling of 31290048 in words is "thirty-one million, two hundred ninety thousand, forty-eight".