13639404 has 12 divisors (see below), whose sum is σ = 31825304. Its totient is φ = 4546464.

The previous prime is 13639361. The next prime is 13639427. The reversal of 13639404 is 40493631.

13639404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568297 + ... + 568320.

Almost surely, 2^13639404 is an apocalyptic number.

It is an amenable number.

13639404 is an abundant number, since it is smaller than the sum of its proper divisors (18185900).

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

13639404 is a wasteful number, since it uses less digits than its factorization.

13639404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136624 (or 1136622 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 13639404 is about 3693.1563736186. The cubic root of 13639404 is about 238.9269455705.

The spelling of 13639404 in words is "thirteen million, six hundred thirty-nine thousand, four hundred four".