18869628 has 24 divisors (see below), whose sum is σ = 44467920. Its totient is φ = 6227200.

The previous prime is 18869623. The next prime is 18869639. The reversal of 18869628 is 82696881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18869623) by changing a digit.

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, 6573 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (1852830).

Almost surely, 2^18869628 is an apocalyptic number.

It is an amenable number.

18869628 is an abundant number, since it is smaller than the sum of its proper divisors (25598292).

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

18869628 is a wasteful number, since it uses less digits than its factorization.

18869628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15677 (or 15675 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 18869628 is about 4343.9185075229. The cubic root of 18869628 is about 266.2284392600.

The spelling of 18869628 in words is "eighteen million, eight hundred sixty-nine thousand, six hundred twenty-eight".