18878976 has 120 divisors (see below), whose sum is σ = 57930444. Its totient is φ = 5898240.

The previous prime is 18878939. The next prime is 18878987. The reversal of 18878976 is 67987881.

It can be written as a sum of positive squares in 2 ways, for example, as 17438976 + 1440000 = 4176^2 + 1200^2 .

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78216 + ... + 78456.

Almost surely, 2^18878976 is an apocalyptic number.

18878976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18878976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28965222).

18878976 is an abundant number, since it is smaller than the sum of its proper divisors (39051468).

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

18878976 is a wasteful number, since it uses less digits than its factorization.

18878976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 263 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 18878976 is about 4344.9943613312. The cubic root of 18878976 is about 266.2723951274.

The spelling of 18878976 in words is "eighteen million, eight hundred seventy-eight thousand, nine hundred seventy-six".