30975730 has 16 divisors (see below), whose sum is σ = 55992024. Its totient is φ = 12337920.

The previous prime is 30975713. The next prime is 30975731. The reversal of 30975730 is 3757903.

It can be written as a sum of positive squares in 4 ways, for example, as 24730729 + 6245001 = 4973^2 + 2499^2 .

It is not an unprimeable number, because it can be changed into a prime (30975731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4017 + ... + 8836.

Almost surely, 2^30975730 is an apocalyptic number.

30975730 is a deficient number, since it is larger than the sum of its proper divisors (25016294).

30975730 is a wasteful number, since it uses less digits than its factorization.

30975730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13101.

The product of its (nonzero) digits is 19845, while the sum is 34.

The square root of 30975730 is about 5565.5844257364. The cubic root of 30975730 is about 314.0560639342.

The spelling of 30975730 in words is "thirty million, nine hundred seventy-five thousand, seven hundred thirty".