16688090 has 16 divisors (see below), whose sum is σ = 30270240. Its totient is φ = 6623760.

The previous prime is 16688081. The next prime is 16688093. The reversal of 16688090 is 9088661.

It is not an unprimeable number, because it can be changed into a prime (16688093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5060 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (1891890).

Almost surely, 2^16688090 is an apocalyptic number.

16688090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16688090 is a deficient number, since it is larger than the sum of its proper divisors (13582150).

16688090 is a wasteful number, since it uses less digits than its factorization.

16688090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12877.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 16688090 is about 4085.1058737810. The cubic root of 16688090 is about 255.5458766201.

The spelling of 16688090 in words is "sixteen million, six hundred eighty-eight thousand, ninety".