17999742 has 8 divisors (see below), whose sum is σ = 35999496. Its totient is φ = 5999912.

The previous prime is 17999699. The next prime is 17999743. The reversal of 17999742 is 24799971.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

17999742 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 17999691 and 17999700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17999743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499973 + ... + 1499984.

It is an arithmetic number, because the mean of its divisors is an integer number (4499937).

Almost surely, 2^17999742 is an apocalyptic number.

17999742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

17999742 is a wasteful number, since it uses less digits than its factorization.

17999742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999962.

The product of its digits is 285768, while the sum is 48.

The square root of 17999742 is about 4242.6102814187. The cubic root of 17999742 is about 262.0728872829.

The spelling of 17999742 in words is "seventeen million, nine hundred ninety-nine thousand, seven hundred forty-two".