30639468 has 12 divisors (see below), whose sum is σ = 71492120. Its totient is φ = 10213152.

The previous prime is 30639463. The next prime is 30639481. The reversal of 30639468 is 86493603.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30639463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276633 + ... + 1276656.

Almost surely, 2^30639468 is an apocalyptic number.

It is an amenable number.

30639468 is an abundant number, since it is smaller than the sum of its proper divisors (40852652).

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

30639468 is a wasteful number, since it uses less digits than its factorization.

30639468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553296 (or 2553294 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 30639468 is about 5535.2929461773. The cubic root of 30639468 is about 312.9154980848.

The spelling of 30639468 in words is "thirty million, six hundred thirty-nine thousand, four hundred sixty-eight".