18078680 has 16 divisors (see below), whose sum is σ = 40677120. Its totient is φ = 7231456.

The previous prime is 18078649. The next prime is 18078719. The reversal of 18078680 is 8687081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225944 + ... + 226023.

It is an arithmetic number, because the mean of its divisors is an integer number (2542320).

Almost surely, 2^18078680 is an apocalyptic number.

18078680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18078680 is an abundant number, since it is smaller than the sum of its proper divisors (22598440).

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

18078680 is a wasteful number, since it uses less digits than its factorization.

18078680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451978 (or 451974 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 18078680 is about 4251.9031033174. The cubic root of 18078680 is about 262.4554361235.

The spelling of 18078680 in words is "eighteen million, seventy-eight thousand, six hundred eighty".