17868242 has 30 divisors (see below), whose sum is σ = 31788549. Its totient is φ = 7532280.

The previous prime is 17868239. The next prime is 17868247. The reversal of 17868242 is 24286871.

It can be written as a sum of positive squares in 2 ways, for example, as 12103441 + 5764801 = 3479^2 + 2401^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2989.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17868196 and 17868205.

It is not an unprimeable number, because it can be changed into a prime (17868247) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 292892 + ... + 292952.

Almost surely, 2^17868242 is an apocalyptic number.

17868242 is a deficient number, since it is larger than the sum of its proper divisors (13920307).

17868242 is an frugal number, since it uses more digits than its factorization.

17868242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 70 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 17868242 is about 4227.0843379332. The cubic root of 17868242 is about 261.4331216139.

The spelling of 17868242 in words is "seventeen million, eight hundred sixty-eight thousand, two hundred forty-two".