13643404 has 6 divisors (see below), whose sum is σ = 23875964. Its totient is φ = 6821700.

The previous prime is 13643353. The next prime is 13643407. The reversal of 13643404 is 40434631.

It is a happy number.

It is a super-2 number, since 2×13643404² = 372284945414432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13643407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705422 + ... + 1705429.

Almost surely, 2^13643404 is an apocalyptic number.

It is an amenable number.

13643404 is a deficient number, since it is larger than the sum of its proper divisors (10232560).

13643404 is a wasteful number, since it uses less digits than its factorization.

13643404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410855 (or 3410853 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 13643404 is about 3693.6978761128. The cubic root of 13643404 is about 238.9502998258.

The spelling of 13643404 in words is "thirteen million, six hundred forty-three thousand, four hundred four".