30745790 has 16 divisors (see below), whose sum is σ = 55626912. Its totient is φ = 12235104.

The previous prime is 30745787. The next prime is 30745807. The reversal of 30745790 is 9754703.

It is a self number, because there is not a number n which added to its sum of digits gives 30745790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5834 + ... + 9773.

It is an arithmetic number, because the mean of its divisors is an integer number (3476682).

Almost surely, 2^30745790 is an apocalyptic number.

30745790 is a deficient number, since it is larger than the sum of its proper divisors (24881122).

30745790 is a wasteful number, since it uses less digits than its factorization.

30745790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 30745790 is about 5544.8886372947. Note that the first 3 decimals coincide. The cubic root of 30745790 is about 313.2770295190.

The spelling of 30745790 in words is "thirty million, seven hundred forty-five thousand, seven hundred ninety".