13643290 has 8 divisors (see below), whose sum is σ = 24557940. Its totient is φ = 5457312.

The previous prime is 13643261. The next prime is 13643293. The reversal of 13643290 is 9234631.

It can be written as a sum of positive squares in 2 ways, for example, as 13638249 + 5041 = 3693^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13643290² = 372278724048200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13643293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682155 + ... + 682174.

Almost surely, 2^13643290 is an apocalyptic number.

13643290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13643290 is a deficient number, since it is larger than the sum of its proper divisors (10914650).

13643290 is a wasteful number, since it uses less digits than its factorization.

13643290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364336.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 13643290 is about 3693.6824443907. The cubic root of 13643290 is about 238.9496342928.

The spelling of 13643290 in words is "thirteen million, six hundred forty-three thousand, two hundred ninety".