18450240 has 56 divisors (see below), whose sum is σ = 58582560. Its totient is φ = 4919808.

The previous prime is 18450233. The next prime is 18450241. The reversal of 18450240 is 4205481.

It is a super-2 number, since 2×18450240² = 680822712115200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18450240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450241) 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, 8650 + ... + 10569.

Almost surely, 2^18450240 is an apocalyptic number.

18450240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18450240 is an abundant number, since it is smaller than the sum of its proper divisors (40132320).

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

18450240 is a wasteful number, since it uses less digits than its factorization.

18450240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239 (or 19229 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 18450240 is about 4295.3742561039. The cubic root of 18450240 is about 264.2412853765.

The spelling of 18450240 in words is "eighteen million, four hundred fifty thousand, two hundred forty".