16690500 has 72 divisors (see below), whose sum is σ = 52667160. Its totient is φ = 4449600.

The previous prime is 16690469. The next prime is 16690507. The reversal of 16690500 is 509661.

It can be written as a sum of positive squares in 4 ways, for example, as 1806336 + 14884164 = 1344^2 + 3858^2 .

It is not an unprimeable number, because it can be changed into a prime (16690507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2646 + ... + 6354.

Almost surely, 2^16690500 is an apocalyptic number.

16690500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16690500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26333580).

16690500 is an abundant number, since it is smaller than the sum of its proper divisors (35976660).

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

16690500 is a wasteful number, since it uses less digits than its factorization.

16690500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 16690500 is about 4085.4008371272. The cubic root of 16690500 is about 255.5581775268.

The spelling of 16690500 in words is "sixteen million, six hundred ninety thousand, five hundred".