31090048 has 64 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 13888000.

The previous prime is 31090021. The next prime is 31090063. The reversal of 31090048 is 84009013.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99813 + ... + 100123.

It is an arithmetic number, because the mean of its divisors is an integer number (1074060).

Almost surely, 2^31090048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31090048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

31090048 is an abundant number, since it is smaller than the sum of its proper divisors (37649792).

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

31090048 is a wasteful number, since it uses less digits than its factorization.

31090048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 31090048 is about 5575.8450480622. The cubic root of 31090048 is about 314.4419379167.

The spelling of 31090048 in words is "thirty-one million, ninety thousand, forty-eight".