30640626 has 32 divisors (see below), whose sum is σ = 68273280. Its totient is φ = 10186128.

The previous prime is 30640609. The next prime is 30640637. The reversal of 30640626 is 62604603.

30640626 is a `hidden beast` number, since 30 + 6 + 4 + 0 + 626 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 30640626.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34500 + ... + 35376.

It is an arithmetic number, because the mean of its divisors is an integer number (2133540).

Almost surely, 2^30640626 is an apocalyptic number.

30640626 is an abundant number, since it is smaller than the sum of its proper divisors (37632654).

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

30640626 is a wasteful number, since it uses less digits than its factorization.

30640626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 30640626 is about 5535.3975466989. The cubic root of 30640626 is about 312.9194401852.

The spelling of 30640626 in words is "thirty million, six hundred forty thousand, six hundred twenty-six".