30920769 has 12 divisors (see below), whose sum is σ = 48723792. Its totient is φ = 18739800.

The previous prime is 30920767. The next prime is 30920797. The reversal of 30920769 is 96702903.

It is not a de Polignac number, because 30920769 - 2¹ = 30920767 is a prime.

It is a super-2 number, since 2×30920769² = 1912187911102722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30920767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156067 + ... + 156264.

It is an arithmetic number, because the mean of its divisors is an integer number (4060316).

Almost surely, 2^30920769 is an apocalyptic number.

It is an amenable number.

30920769 is a deficient number, since it is larger than the sum of its proper divisors (17803023).

30920769 is a wasteful number, since it uses less digits than its factorization.

30920769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312348 (or 312345 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 30920769 is about 5560.6446568721. The cubic root of 30920769 is about 313.8702081671.

The spelling of 30920769 in words is "thirty million, nine hundred twenty thousand, seven hundred sixty-nine".