16987690 has 16 divisors (see below), whose sum is σ = 31564800. Its totient is φ = 6575760.

The previous prime is 16987679. The next prime is 16987703. The reversal of 16987690 is 9678961.

It is a super-2 number, since 2×16987690² = 577163223072200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16987690.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27090 + ... + 27709.

It is an arithmetic number, because the mean of its divisors is an integer number (1972800).

Almost surely, 2^16987690 is an apocalyptic number.

16987690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16987690 is a deficient number, since it is larger than the sum of its proper divisors (14577110).

16987690 is a wasteful number, since it uses less digits than its factorization.

16987690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54837.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 16987690 is about 4121.6125485057. The cubic root of 16987690 is about 257.0660804001.

The spelling of 16987690 in words is "sixteen million, nine hundred eighty-seven thousand, six hundred ninety".