16287990 has 16 divisors (see below), whose sum is σ = 39091248. Its totient is φ = 4343456.

The previous prime is 16287977. The next prime is 16288007. The reversal of 16287990 is 9978261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271437 + ... + 271496.

It is an arithmetic number, because the mean of its divisors is an integer number (2443203).

Almost surely, 2^16287990 is an apocalyptic number.

16287990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16287990 is an abundant number, since it is smaller than the sum of its proper divisors (22803258).

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

16287990 is a wasteful number, since it uses less digits than its factorization.

16287990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542943.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 16287990 is about 4035.8382029016. The cubic root of 16287990 is about 253.4870815711.

The spelling of 16287990 in words is "sixteen million, two hundred eighty-seven thousand, nine hundred ninety".