14991690 has 32 divisors (see below), whose sum is σ = 41120640. Its totient is φ = 3426624.

The previous prime is 14991689. The next prime is 14991701. The reversal of 14991690 is 9619941.

It is a super-2 number, since 2×14991690² = 449501538112200, which contains 22 as substring.

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, 35485 + ... + 35904.

It is an arithmetic number, because the mean of its divisors is an integer number (1285020).

Almost surely, 2^14991690 is an apocalyptic number.

14991690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

14991690 is an abundant number, since it is smaller than the sum of its proper divisors (26128950).

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

14991690 is a wasteful number, since it uses less digits than its factorization.

14991690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71406.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 14991690 is about 3871.9103811943. The cubic root of 14991690 is about 246.5756563039.

The spelling of 14991690 in words is "fourteen million, nine hundred ninety-one thousand, six hundred ninety".