18880064 has 112 divisors (see below), whose sum is σ = 47256192. Its totient is φ = 7299072.

The previous prime is 18880061. The next prime is 18880087. The reversal of 18880064 is 46008881.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (18880061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281759 + ... + 281825.

Almost surely, 2^18880064 is an apocalyptic number.

18880064 is a gapful number since it is divisible by the number (14) 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 18880064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23628096).

18880064 is an abundant number, since it is smaller than the sum of its proper divisors (28376128).

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

18880064 is a wasteful number, since it uses less digits than its factorization.

18880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18880064 is about 4345.1195610708. The cubic root of 18880064 is about 266.2775101435.

The spelling of 18880064 in words is "eighteen million, eight hundred eighty thousand, sixty-four".