30638480 has 40 divisors (see below), whose sum is σ = 72979704. Its totient is φ = 11955200.

The previous prime is 30638477. The next prime is 30638513. The reversal of 30638480 is 8483603.

It can be written as a sum of positive squares in 4 ways, for example, as 123904 + 30514576 = 352^2 + 5524^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 1391 + ... + 7950.

Almost surely, 2^30638480 is an apocalyptic number.

It is an amenable number.

30638480 is an abundant number, since it is smaller than the sum of its proper divisors (42341224).

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

30638480 is a wasteful number, since it uses less digits than its factorization.

30638480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9395 (or 9389 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 30638480 is about 5535.2036999554. The cubic root of 30638480 is about 312.9121346252.

The spelling of 30638480 in words is "thirty million, six hundred thirty-eight thousand, four hundred eighty".