18764328 has 128 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 5160960.

The previous prime is 18764321. The next prime is 18764329. The reversal of 18764328 is 82346781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18764321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166000 + ... + 166112.

It is an arithmetic number, because the mean of its divisors is an integer number (438615).

Almost surely, 2^18764328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18764328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28071360).

18764328 is an abundant number, since it is smaller than the sum of its proper divisors (37378392).

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

18764328 is a wasteful number, since it uses less digits than its factorization.

18764328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 183 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18764328 is about 4331.7811579072. The cubic root of 18764328 is about 265.7322951637.

The spelling of 18764328 in words is "eighteen million, seven hundred sixty-four thousand, three hundred twenty-eight".