18865028 has 24 divisors (see below), whose sum is σ = 40633152. Its totient is φ = 7462944.

The previous prime is 18865027. The next prime is 18865031. The reversal of 18865028 is 82056881.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18864982 and 18865000.

It is not an unprimeable number, because it can be changed into a prime (18865027) 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, 25550 + ... + 26277.

It is an arithmetic number, because the mean of its divisors is an integer number (1693048).

Almost surely, 2^18865028 is an apocalyptic number.

It is an amenable number.

18865028 is an abundant number, since it is smaller than the sum of its proper divisors (21768124).

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

18865028 is a wasteful number, since it uses less digits than its factorization.

18865028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51851 (or 51849 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 18865028 is about 4343.3889993875. The cubic root of 18865028 is about 266.2068039572.

The spelling of 18865028 in words is "eighteen million, eight hundred sixty-five thousand, twenty-eight".