18290736 has 60 divisors (see below), whose sum is σ = 51938640. Its totient is φ = 6007680.

The previous prime is 18290707. The next prime is 18290761. The reversal of 18290736 is 63709281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18290736.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9330 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (865644).

Almost surely, 2^18290736 is an apocalyptic number.

18290736 is a gapful number since it is divisible by the number (16) 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 18290736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25969320).

18290736 is an abundant number, since it is smaller than the sum of its proper divisors (33647904).

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

18290736 is a wasteful number, since it uses less digits than its factorization.

18290736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 18290736 is about 4276.7670032397. The cubic root of 18290736 is about 263.4776171687.

The spelling of 18290736 in words is "eighteen million, two hundred ninety thousand, seven hundred thirty-six".