30725745 has 16 divisors (see below), whose sum is σ = 49551360. Its totient is φ = 16258032.

The previous prime is 30725741. The next prime is 30725753. The reversal of 30725745 is 54752703.

It is not a de Polignac number, because 30725745 - 2² = 30725741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30725741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241872 + ... + 241998.

It is an arithmetic number, because the mean of its divisors is an integer number (3096960).

Almost surely, 2^30725745 is an apocalyptic number.

It is an amenable number.

30725745 is a deficient number, since it is larger than the sum of its proper divisors (18825615).

30725745 is an frugal number, since it uses more digits than its factorization.

30725745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 30725745 is about 5543.0808220700. The cubic root of 30725745 is about 313.2089334400.

The spelling of 30725745 in words is "thirty million, seven hundred twenty-five thousand, seven hundred forty-five".