18878064 has 40 divisors (see below), whose sum is σ = 48925440. Its totient is φ = 6272448.

The previous prime is 18878063. The next prime is 18878071. The reversal of 18878064 is 46087881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18878063) 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, 25897 + ... + 26615.

It is an arithmetic number, because the mean of its divisors is an integer number (1223136).

Almost surely, 2^18878064 is an apocalyptic number.

It is an amenable number.

18878064 is an abundant number, since it is smaller than the sum of its proper divisors (30047376).

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

18878064 is a wasteful number, since it uses less digits than its factorization.

18878064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18878064 is about 4344.8894117112. The cubic root of 18878064 is about 266.2681073889.

The spelling of 18878064 in words is "eighteen million, eight hundred seventy-eight thousand, sixty-four".