18278064 has 60 divisors (see below), whose sum is σ = 58464016. Its totient is φ = 5222016.

The previous prime is 18278063. The next prime is 18278081. The reversal of 18278064 is 46087281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18278063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8059 + ... + 10074.

Almost surely, 2^18278064 is an apocalyptic number.

18278064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18278064 is an abundant number, since it is smaller than the sum of its proper divisors (40185952).

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

18278064 is a wasteful number, since it uses less digits than its factorization.

18278064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18154 (or 18145 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 18278064 is about 4275.2852536410. The cubic root of 18278064 is about 263.4167564920.

The spelling of 18278064 in words is "eighteen million, two hundred seventy-eight thousand, sixty-four".