30840769 has 4 divisors (see below), whose sum is σ = 32181696. Its totient is φ = 29499844.

The previous prime is 30840757. The next prime is 30840773. The reversal of 30840769 is 96704803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30840769 is a prime.

It is a super-2 number, since 2×30840769² = 1902306065022722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30840709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670429 + ... + 670474.

It is an arithmetic number, because the mean of its divisors is an integer number (8045424).

Almost surely, 2^30840769 is an apocalyptic number.

It is an amenable number.

30840769 is a deficient number, since it is larger than the sum of its proper divisors (1340927).

30840769 is a wasteful number, since it uses less digits than its factorization.

30840769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340926.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 30840769 is about 5553.4465874806. The cubic root of 30840769 is about 313.5992866725.

The spelling of 30840769 in words is "thirty million, eight hundred forty thousand, seven hundred sixty-nine".