13904690 has 8 divisors (see below), whose sum is σ = 25028460. Its totient is φ = 5561872.

The previous prime is 13904687. The next prime is 13904701. The reversal of 13904690 is 9640931.

It can be written as a sum of positive squares in 2 ways, for example, as 13890529 + 14161 = 3727^2 + 119^2 .

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

It is a super-2 number, since 2×13904690² = 386680807992200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695225 + ... + 695244.

Almost surely, 2^13904690 is an apocalyptic number.

13904690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13904690 is a deficient number, since it is larger than the sum of its proper divisors (11123770).

13904690 is a wasteful number, since it uses less digits than its factorization.

13904690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390476.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 13904690 is about 3728.8993014025. The cubic root of 13904690 is about 240.4660504202.

The spelling of 13904690 in words is "thirteen million, nine hundred four thousand, six hundred ninety".