30840644 has 6 divisors (see below), whose sum is σ = 53971134. Its totient is φ = 15420320.

The previous prime is 30840619. The next prime is 30840661. The reversal of 30840644 is 44604803.

It can be written as a sum of positive squares in only one way, i.e., 30118144 + 722500 = 5488^2 + 850^2 .

It is a super-2 number, since 2×30840644² = 1902290644669472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3855077 + ... + 3855084.

It is an arithmetic number, because the mean of its divisors is an integer number (8995189).

Almost surely, 2^30840644 is an apocalyptic number.

It is an amenable number.

30840644 is a deficient number, since it is larger than the sum of its proper divisors (23130490).

30840644 is a wasteful number, since it uses less digits than its factorization.

30840644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710165 (or 7710163 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 30840644 is about 5553.4353331969. The cubic root of 30840644 is about 313.5988629913.

The spelling of 30840644 in words is "thirty million, eight hundred forty thousand, six hundred forty-four".