18528040 has 32 divisors (see below), whose sum is σ = 43884000. Its totient is φ = 7020864.

The previous prime is 18528031. The next prime is 18528043. The reversal of 18528040 is 4082581.

It is not an unprimeable number, because it can be changed into a prime (18528043) 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, 11430 + ... + 12949.

It is an arithmetic number, because the mean of its divisors is an integer number (1371375).

Almost surely, 2^18528040 is an apocalyptic number.

18528040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18528040 is an abundant number, since it is smaller than the sum of its proper divisors (25355960).

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

18528040 is a wasteful number, since it uses less digits than its factorization.

18528040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24409 (or 24405 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 18528040 is about 4304.4209831289. The cubic root of 18528040 is about 264.6121774549.

The spelling of 18528040 in words is "eighteen million, five hundred twenty-eight thousand, forty".