30947769 has 24 divisors (see below), whose sum is σ = 48054240. Its totient is φ = 19122048.

The previous prime is 30947737. The next prime is 30947773. The reversal of 30947769 is 96774903.

It is not a de Polignac number, because 30947769 - 2⁵ = 30947737 is a prime.

It is a super-2 number, since 2×30947769² = 1915528812154722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30947729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8742 + ... + 11760.

It is an arithmetic number, because the mean of its divisors is an integer number (2002260).

Almost surely, 2^30947769 is an apocalyptic number.

It is an amenable number.

30947769 is a deficient number, since it is larger than the sum of its proper divisors (17106471).

30947769 is a wasteful number, since it uses less digits than its factorization.

30947769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 30947769 is about 5563.0719031844. The cubic root of 30947769 is about 313.9615386918.

The spelling of 30947769 in words is "thirty million, nine hundred forty-seven thousand, seven hundred sixty-nine".