18366240 has 96 divisors (see below), whose sum is σ = 58677696. Its totient is φ = 4828160.

The previous prime is 18366233. The next prime is 18366253. The reversal of 18366240 is 4266381.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18366198 and 18366207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39610 + ... + 40070.

It is an arithmetic number, because the mean of its divisors is an integer number (611226).

Almost surely, 2^18366240 is an apocalyptic number.

18366240 is a gapful number since it is divisible by the number (10) 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 18366240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29338848).

18366240 is an abundant number, since it is smaller than the sum of its proper divisors (40311456).

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

18366240 is a wasteful number, since it uses less digits than its factorization.

18366240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 18366240 is about 4285.5851409113. The cubic root of 18366240 is about 263.8396638910.

The spelling of 18366240 in words is "eighteen million, three hundred sixty-six thousand, two hundred forty".