18295840 has 48 divisors (see below), whose sum is σ = 44294040. Its totient is φ = 7137280.

The previous prime is 18295807. The next prime is 18295867. The reversal of 18295840 is 4859281.

18295840 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 11048976 + 7246864 = 3324^2 + 2692^2 .

It is a super-2 number, since 2×18295840² = 669475522611200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18295840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5166 + ... + 7954.

Almost surely, 2^18295840 is an apocalyptic number.

18295840 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 18295840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22147020).

18295840 is an abundant number, since it is smaller than the sum of its proper divisors (25998200).

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

18295840 is a wasteful number, since it uses less digits than its factorization.

18295840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845 (or 2837 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18295840 is about 4277.3636740404. The cubic root of 18295840 is about 263.5021225556.

The spelling of 18295840 in words is "eighteen million, two hundred ninety-five thousand, eight hundred forty".