30644939 has 12 divisors (see below), whose sum is σ = 33963336. Its totient is φ = 27623232.

The previous prime is 30644927. The next prime is 30644941. The reversal of 30644939 is 93944603.

It is not a de Polignac number, because 30644939 - 2⁸ = 30644683 is a prime.

It is a super-2 number, since 2×30644939² = 1878224572627442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30644959) 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, 5159 + ... + 9375.

It is an arithmetic number, because the mean of its divisors is an integer number (2830278).

Almost surely, 2^30644939 is an apocalyptic number.

30644939 is a deficient number, since it is larger than the sum of its proper divisors (3318397).

30644939 is a wasteful number, since it uses less digits than its factorization.

30644939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286 (or 4273 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 30644939 is about 5535.7871165716. The cubic root of 30644939 is about 312.9341217633.

The spelling of 30644939 in words is "thirty million, six hundred forty-four thousand, nine hundred thirty-nine".