13670638 has 4 divisors (see below), whose sum is σ = 20505960. Its totient is φ = 6835318.

The previous prime is 13670623. The next prime is 13670639. The reversal of 13670638 is 83607631.

13670638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13670639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3417658 + ... + 3417661.

It is an arithmetic number, because the mean of its divisors is an integer number (5126490).

Almost surely, 2^13670638 is an apocalyptic number.

13670638 is a deficient number, since it is larger than the sum of its proper divisors (6835322).

13670638 is an equidigital number, since it uses as much as digits as its factorization.

13670638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6835321.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 13670638 is about 3697.3825877234. The cubic root of 13670638 is about 239.1091860607.

The spelling of 13670638 in words is "thirteen million, six hundred seventy thousand, six hundred thirty-eight".