18300240 has 120 divisors (see below), whose sum is σ = 70257408. Its totient is φ = 4181760.

The previous prime is 18300229. The next prime is 18300253. The reversal of 18300240 is 4200381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3225 + ... + 6855.

Almost surely, 2^18300240 is an apocalyptic number.

18300240 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 18300240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35128704).

18300240 is an abundant number, since it is smaller than the sum of its proper divisors (51957168).

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

18300240 is a wasteful number, since it uses less digits than its factorization.

18300240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657 (or 3648 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18300240 is about 4277.8779786244. The cubic root of 18300240 is about 263.5232442315.

The spelling of 18300240 in words is "eighteen million, three hundred thousand, two hundred forty".