30748905 has 24 divisors (see below), whose sum is σ = 58144320. Its totient is φ = 14908320.

The previous prime is 30748901. The next prime is 30748919. The reversal of 30748905 is 50984703.

It is not a de Polignac number, because 30748905 - 2² = 30748901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30748905.

It is not an unprimeable number, because it can be changed into a prime (30748901) 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 23 ways as a sum of consecutive naturals, for example, 30565 + ... + 31554.

It is an arithmetic number, because the mean of its divisors is an integer number (2422680).

Almost surely, 2^30748905 is an apocalyptic number.

It is an amenable number.

30748905 is a deficient number, since it is larger than the sum of its proper divisors (27395415).

30748905 is a wasteful number, since it uses less digits than its factorization.

30748905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62141 (or 62138 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 30748905 is about 5545.1695195007. The cubic root of 30748905 is about 313.2876090162.

The spelling of 30748905 in words is "thirty million, seven hundred forty-eight thousand, nine hundred five".