30506644 has 12 divisors (see below), whose sum is σ = 61013344. Its totient is φ = 13074264.

The previous prime is 30506639. The next prime is 30506689. The reversal of 30506644 is 44660503.

30506644 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1089523 = 30506644 / (3 + 0 + 5 + 0 + 6 + 6 + 4 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544734 + ... + 544789.

Almost surely, 2^30506644 is an apocalyptic number.

It is an amenable number.

30506644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30506644 is a wasteful number, since it uses less digits than its factorization.

30506644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089534 (or 1089532 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 30506644 is about 5523.2819953357. The cubic root of 30506644 is about 312.4626737284.

The spelling of 30506644 in words is "thirty million, five hundred six thousand, six hundred forty-four".