17999340 has 48 divisors (see below), whose sum is σ = 52593408. Its totient is φ = 4590784.

The previous prime is 17999323. The next prime is 17999347. The reversal of 17999340 is 4399971.

It is a junction number, because it is equal to n+sod(n) for n = 17999292 and 17999301.

It is not an unprimeable number, because it can be changed into a prime (17999347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5142 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (1095696).

Almost surely, 2^17999340 is an apocalyptic number.

17999340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17999340 is an abundant number, since it is smaller than the sum of its proper divisors (34594068).

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

17999340 is a wasteful number, since it uses less digits than its factorization.

17999340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13078 (or 13076 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 17999340 is about 4242.5629046603. The cubic root of 17999340 is about 262.0709362534.

The spelling of 17999340 in words is "seventeen million, nine hundred ninety-nine thousand, three hundred forty".