30748631 has 16 divisors (see below), whose sum is σ = 35769600. Its totient is φ = 26218368.

The previous prime is 30748603. The next prime is 30748633. The reversal of 30748631 is 13684703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30748631 is a prime.

It is a super-2 number, since 2×30748631² = 1890956616748322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30748633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5360 + ... + 9498.

It is an arithmetic number, because the mean of its divisors is an integer number (2235600).

Almost surely, 2^30748631 is an apocalyptic number.

30748631 is a deficient number, since it is larger than the sum of its proper divisors (5020969).

30748631 is a wasteful number, since it uses less digits than its factorization.

30748631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 30748631 is about 5545.1448132578. The cubic root of 30748631 is about 313.2866784567.

The spelling of 30748631 in words is "thirty million, seven hundred forty-eight thousand, six hundred thirty-one".