16223990 has 16 divisors (see below), whose sum is σ = 29261520. Its totient is φ = 6476640.

The previous prime is 16223959. The next prime is 16224017. The reversal of 16223990 is 9932261.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4880 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (1828845).

Almost surely, 2^16223990 is an apocalyptic number.

16223990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16223990 is a deficient number, since it is larger than the sum of its proper divisors (13037530).

16223990 is a wasteful number, since it uses less digits than its factorization.

16223990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16223990 is about 4027.9014387147. The cubic root of 16223990 is about 253.1546389111.

The spelling of 16223990 in words is "sixteen million, two hundred twenty-three thousand, nine hundred ninety".