18750528 has 70 divisors (see below), whose sum is σ = 55597806. Its totient is φ = 6248448.

The previous prime is 18750503. The next prime is 18750533. The reversal of 18750528 is 82505781.

18750528 is a `hidden beast` number, since 1 + 87 + 50 + 528 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10036224 + 8714304 = 3168^2 + 2952^2 .

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 = 18750492 and 18750501.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3376 + ... + 6992.

Almost surely, 2^18750528 is an apocalyptic number.

18750528 is a gapful number since it is divisible by the number (18) 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 18750528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27798903).

18750528 is an abundant number, since it is smaller than the sum of its proper divisors (36847278).

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

18750528 is an equidigital number, since it uses as much as digits as its factorization.

18750528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641 (or 3622 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 18750528 is about 4330.1879866814. The cubic root of 18750528 is about 265.6671359777.

The spelling of 18750528 in words is "eighteen million, seven hundred fifty thousand, five hundred twenty-eight".