13918690 has 32 divisors (see below), whose sum is σ = 26334720. Its totient is φ = 5289600.

The previous prime is 13918687. The next prime is 13918711. The reversal of 13918690 is 9681931.

It is a super-2 number, since 2×13918690² = 387459862632200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 17910 + ... + 18670.

It is an arithmetic number, because the mean of its divisors is an integer number (822960).

Almost surely, 2^13918690 is an apocalyptic number.

13918690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13918690 is a deficient number, since it is larger than the sum of its proper divisors (12416030).

13918690 is a wasteful number, since it uses less digits than its factorization.

13918690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 13918690 is about 3730.7760586773. The cubic root of 13918690 is about 240.5467281261.

The spelling of 13918690 in words is "thirteen million, nine hundred eighteen thousand, six hundred ninety".