16628990 has 32 divisors (see below), whose sum is σ = 36011520. Its totient is φ = 5400864.

The previous prime is 16628951. The next prime is 16628993. The reversal of 16628990 is 9982661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4922 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (1125360).

Almost surely, 2^16628990 is an apocalyptic number.

16628990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16628990 is an abundant number, since it is smaller than the sum of its proper divisors (19382530).

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

16628990 is a wasteful number, since it uses less digits than its factorization.

16628990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12536.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 16628990 is about 4077.8658634143. The cubic root of 16628990 is about 255.2438523417.

The spelling of 16628990 in words is "sixteen million, six hundred twenty-eight thousand, nine hundred ninety".