18572328 has 40 divisors (see below), whose sum is σ = 52021530. Its totient is φ = 6190560.

The previous prime is 18572321. The next prime is 18572363. The reversal of 18572328 is 82327581.

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 8191044 = 3222^2 + 2862^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18572292 and 18572301.

It is not an unprimeable number, because it can be changed into a prime (18572321) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13683 + ... + 14978.

Almost surely, 2^18572328 is an apocalyptic number.

18572328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18572328 is an abundant number, since it is smaller than the sum of its proper divisors (33449202).

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

18572328 is a wasteful number, since it uses less digits than its factorization.

18572328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28679 (or 28666 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18572328 is about 4309.5623907770. The cubic root of 18572328 is about 264.8228458793.

The spelling of 18572328 in words is "eighteen million, five hundred seventy-two thousand, three hundred twenty-eight".