16685490 has 32 divisors (see below), whose sum is σ = 40533696. Its totient is φ = 4395200.

The previous prime is 16685447. The next prime is 16685507. The reversal of 16685490 is 9458661.

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, 861 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (1266678).

Almost surely, 2^16685490 is an apocalyptic number.

16685490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16685490 is an abundant number, since it is smaller than the sum of its proper divisors (23848206).

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

16685490 is a wasteful number, since it uses less digits than its factorization.

16685490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 16685490 is about 4084.7876321787. The cubic root of 16685490 is about 255.5326046041.

The spelling of 16685490 in words is "sixteen million, six hundred eighty-five thousand, four hundred ninety".