16989810 has 32 divisors (see below), whose sum is σ = 40891392. Its totient is φ = 4517760.

The previous prime is 16989799. The next prime is 16989821. The reversal of 16989810 is 1898961.

It is an interprime number because it is at equal distance from previous prime (16989799) and next prime (16989821).

It is a super-2 number, since 2×16989810² = 577307287672200, which contains 22 as substring.

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

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, 15087 + ... + 16173.

It is an arithmetic number, because the mean of its divisors is an integer number (1277856).

Almost surely, 2^16989810 is an apocalyptic number.

16989810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16989810 is an abundant number, since it is smaller than the sum of its proper divisors (23901582).

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

16989810 is a wasteful number, since it uses less digits than its factorization.

16989810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 16989810 is about 4121.8697213765. The cubic root of 16989810 is about 257.0767735829.

The spelling of 16989810 in words is "sixteen million, nine hundred eighty-nine thousand, eight hundred ten".