30625638 has 16 divisors (see below), whose sum is σ = 61343040. Its totient is φ = 10193256.

The previous prime is 30625607. The next prime is 30625667. The reversal of 30625638 is 83652603.

It is a junction number, because it is equal to n+sod(n) for n = 30625599 and 30625608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981 + ... + 7887.

It is an arithmetic number, because the mean of its divisors is an integer number (3833940).

Almost surely, 2^30625638 is an apocalyptic number.

30625638 is an abundant number, since it is smaller than the sum of its proper divisors (30717402).

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

30625638 is a wasteful number, since it uses less digits than its factorization.

30625638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 30625638 is about 5534.0435487987. The cubic root of 30625638 is about 312.8684098800.

The spelling of 30625638 in words is "thirty million, six hundred twenty-five thousand, six hundred thirty-eight".