18350040 has 64 divisors (see below), whose sum is σ = 56959200. Its totient is φ = 4723712.

The previous prime is 18350023. The next prime is 18350063. The reversal of 18350040 is 4005381.

It is a junction number, because it is equal to n+sod(n) for n = 18349989 and 18350016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844 + ... + 6116.

Almost surely, 2^18350040 is an apocalyptic number.

18350040 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 18350040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28479600).

18350040 is an abundant number, since it is smaller than the sum of its proper divisors (38609160).

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

18350040 is a wasteful number, since it uses less digits than its factorization.

18350040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316 (or 5312 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 18350040 is about 4283.6946669902. The cubic root of 18350040 is about 263.7620675356.

The spelling of 18350040 in words is "eighteen million, three hundred fifty thousand, forty".