30745972 has 12 divisors (see below), whose sum is σ = 53930016. Its totient is φ = 15337400.

The previous prime is 30745961. The next prime is 30745973. The reversal of 30745972 is 27954703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30745973) 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 3 ways as a sum of consecutive naturals, for example, 6904 + ... + 10447.

It is an arithmetic number, because the mean of its divisors is an integer number (4494168).

Almost surely, 2^30745972 is an apocalyptic number.

It is an amenable number.

30745972 is a deficient number, since it is larger than the sum of its proper divisors (23184044).

30745972 is a wasteful number, since it uses less digits than its factorization.

30745972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17798 (or 17796 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 30745972 is about 5544.9050487813. The cubic root of 30745972 is about 313.2776476666.

The spelling of 30745972 in words is "thirty million, seven hundred forty-five thousand, nine hundred seventy-two".