18887028 has 24 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 6271200.

The previous prime is 18887023. The next prime is 18887039. The reversal of 18887028 is 82078881.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303 + ... + 6153.

It is an arithmetic number, because the mean of its divisors is an integer number (1843380).

Almost surely, 2^18887028 is an apocalyptic number.

It is an amenable number.

18887028 is an abundant number, since it is smaller than the sum of its proper divisors (25354092).

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

18887028 is a wasteful number, since it uses less digits than its factorization.

18887028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127 (or 6125 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 42.

The square root of 18887028 is about 4345.9208460348. The cubic root of 18887028 is about 266.3102453545.

The spelling of 18887028 in words is "eighteen million, eight hundred eighty-seven thousand, twenty-eight".