30638645 has 16 divisors (see below), whose sum is σ = 39692160. Its totient is φ = 22634304.

The previous prime is 30638617. The next prime is 30638681. The reversal of 30638645 is 54683603.

It is a cyclic number.

It is not a de Polignac number, because 30638645 - 2⁶ = 30638581 is a prime.

It is a congruent number.

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, 1259 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (2480760).

Almost surely, 2^30638645 is an apocalyptic number.

It is an amenable number.

30638645 is a deficient number, since it is larger than the sum of its proper divisors (9053515).

30638645 is a wasteful number, since it uses less digits than its factorization.

30638645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 30638645 is about 5535.2186045359. The cubic root of 30638645 is about 312.9126963416.

The spelling of 30638645 in words is "thirty million, six hundred thirty-eight thousand, six hundred forty-five".