18678880 has 48 divisors (see below), whose sum is σ = 48145104. Its totient is φ = 6791680.

The previous prime is 18678853. The next prime is 18678889. The reversal of 18678880 is 8887681.

It is a self number, because there is not a number n which added to its sum of digits gives 18678880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18678889) 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, 3547 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (1003023).

Almost surely, 2^18678880 is an apocalyptic number.

18678880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18678880 is an abundant number, since it is smaller than the sum of its proper divisors (29466224).

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

18678880 is a wasteful number, since it uses less digits than its factorization.

18678880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10639 (or 10631 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 46.

The square root of 18678880 is about 4321.9069865049. The cubic root of 18678880 is about 265.3283221419.

The spelling of 18678880 in words is "eighteen million, six hundred seventy-eight thousand, eight hundred eighty".