13643670 has 32 divisors (see below), whose sum is σ = 32872032. Its totient is φ = 3624192.

The previous prime is 13643633. The next prime is 13643683. The reversal of 13643670 is 7634631.

13643670 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13643670² = 372299462137800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8664 + ... + 10116.

It is an arithmetic number, because the mean of its divisors is an integer number (1027251).

Almost surely, 2^13643670 is an apocalyptic number.

13643670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13643670 is an abundant number, since it is smaller than the sum of its proper divisors (19228362).

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

13643670 is a wasteful number, since it uses less digits than its factorization.

13643670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 13643670 is about 3693.7338832136. The cubic root of 13643670 is about 238.9518527219.

The spelling of 13643670 in words is "thirteen million, six hundred forty-three thousand, six hundred seventy".