18258880 has 28 divisors (see below), whose sum is σ = 43479720. Its totient is φ = 7303424.

The previous prime is 18258869. The next prime is 18258887. The reversal of 18258880 is 8885281.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18258887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28210 + ... + 28849.

Almost surely, 2^18258880 is an apocalyptic number.

18258880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18258880 is an abundant number, since it is smaller than the sum of its proper divisors (25220840).

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

18258880 is an equidigital number, since it uses as much as digits as its factorization.

18258880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57076 (or 57066 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 18258880 is about 4273.0410716491. The cubic root of 18258880 is about 263.3245666401.

The spelling of 18258880 in words is "eighteen million, two hundred fifty-eight thousand, eight hundred eighty".