16628180 has 12 divisors (see below), whose sum is σ = 34919220. Its totient is φ = 6651264.

The previous prime is 16628111. The next prime is 16628189. The reversal of 16628180 is 8182661.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 8596624 = 2834^2 + 2932^2 .

It is a super-2 number, since 2×16628180² = 552992740224800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415685 + ... + 415724.

It is an arithmetic number, because the mean of its divisors is an integer number (2909935).

Almost surely, 2^16628180 is an apocalyptic number.

16628180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16628180 is an abundant number, since it is smaller than the sum of its proper divisors (18291040).

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

16628180 is a wasteful number, since it uses less digits than its factorization.

16628180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831418 (or 831416 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 16628180 is about 4077.7665455492. The cubic root of 16628180 is about 255.2397079554.

The spelling of 16628180 in words is "sixteen million, six hundred twenty-eight thousand, one hundred eighty".