16856490 has 48 divisors (see below), whose sum is σ = 47064672. Its totient is φ = 3852576.

The previous prime is 16856443. The next prime is 16856501. The reversal of 16856490 is 9465861.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4264 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (980514).

Almost surely, 2^16856490 is an apocalyptic number.

16856490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16856490 is an abundant number, since it is smaller than the sum of its proper divisors (30208182).

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

16856490 is a wasteful number, since it uses less digits than its factorization.

16856490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491 (or 11484 counting only the distinct ones).

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

The square root of 16856490 is about 4105.6655976833. The cubic root of 16856490 is about 256.4025750101.

The spelling of 16856490 in words is "sixteen million, eight hundred fifty-six thousand, four hundred ninety".