31490048 has 48 divisors (see below), whose sum is σ = 65076255. Its totient is φ = 15237120.

The previous prime is 31490023. The next prime is 31490057. The reversal of 31490048 is 84009413.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 15745024 = 3968^2 + 3968^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3968.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31490048.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1015793 + ... + 1015823.

Almost surely, 2^31490048 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 31490048

31490048 is an abundant number, since it is smaller than the sum of its proper divisors (33586207).

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

31490048 is an frugal number, since it uses more digits than its factorization.

31490048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31490048 is about 5611.5994154964. The cubic root of 31490048 is about 315.7847169030.

The spelling of 31490048 in words is "thirty-one million, four hundred ninety thousand, forty-eight".