18878285 has 16 divisors (see below), whose sum is σ = 23829120. Its totient is φ = 14329920.

The previous prime is 18878263. The next prime is 18878291. The reversal of 18878285 is 58287881.

It is not a de Polignac number, because 18878285 - 2⁶ = 18878221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15395 + ... + 16575.

It is an arithmetic number, because the mean of its divisors is an integer number (1489320).

Almost surely, 2^18878285 is an apocalyptic number.

It is an amenable number.

18878285 is a deficient number, since it is larger than the sum of its proper divisors (4950835).

18878285 is a wasteful number, since it uses less digits than its factorization.

18878285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its digits is 286720, while the sum is 47.

The square root of 18878285 is about 4344.9148438145. The cubic root of 18878285 is about 266.2691464260.

The spelling of 18878285 in words is "eighteen million, eight hundred seventy-eight thousand, two hundred eighty-five".