30753945 has 32 divisors (see below), whose sum is σ = 55059840. Its totient is φ = 16286400.

The previous prime is 30753941. The next prime is 30753959. The reversal of 30753945 is 54935703.

It is not a de Polignac number, because 30753945 - 2² = 30753941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30753941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20470 + ... + 21920.

It is an arithmetic number, because the mean of its divisors is an integer number (1720620).

Almost surely, 2^30753945 is an apocalyptic number.

It is an amenable number.

30753945 is a deficient number, since it is larger than the sum of its proper divisors (24305895).

30753945 is a wasteful number, since it uses less digits than its factorization.

30753945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 30753945 is about 5545.6239504676. The cubic root of 30753945 is about 313.3047248917.

The spelling of 30753945 in words is "thirty million, seven hundred fifty-three thousand, nine hundred forty-five".