30997648 has 20 divisors (see below), whose sum is σ = 65518128. Its totient is φ = 14089760.

The previous prime is 30997639. The next prime is 30997649. The reversal of 30997648 is 84679903.

It is a junction number, because it is equal to n+sod(n) for n = 30997598 and 30997607.

It is not an unprimeable number, because it can be changed into a prime (30997649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 87886 + ... + 88237.

Almost surely, 2^30997648 is an apocalyptic number.

It is an amenable number.

30997648 is an abundant number, since it is smaller than the sum of its proper divisors (34520480).

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

30997648 is a wasteful number, since it uses less digits than its factorization.

30997648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176142 (or 176136 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 30997648 is about 5567.5531429884. The cubic root of 30997648 is about 314.1301203852.

The spelling of 30997648 in words is "thirty million, nine hundred ninety-seven thousand, six hundred forty-eight".