30664839 has 8 divisors (see below), whose sum is σ = 41113072. Its totient is φ = 20329920.

The previous prime is 30664831. The next prime is 30664849. The reversal of 30664839 is 93846603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30664839 - 2³ = 30664831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30664797 and 30664806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30664831) 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, 27694 + ... + 28779.

It is an arithmetic number, because the mean of its divisors is an integer number (5139134).

Almost surely, 2^30664839 is an apocalyptic number.

30664839 is a deficient number, since it is larger than the sum of its proper divisors (10448233).

30664839 is a wasteful number, since it uses less digits than its factorization.

30664839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56657.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 30664839 is about 5537.5842205785. The cubic root of 30664839 is about 313.0018441099.

The spelling of 30664839 in words is "thirty million, six hundred sixty-four thousand, eight hundred thirty-nine".