17972898 has 32 divisors (see below), whose sum is σ = 38869440. Its totient is φ = 5520960.

The previous prime is 17972891. The next prime is 17972947. The reversal of 17972898 is 89827971.

It is a self number, because there is not a number n which added to its sum of digits gives 17972898.

It is not an unprimeable number, because it can be changed into a prime (17972891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2088 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (1214670).

Almost surely, 2^17972898 is an apocalyptic number.

17972898 is an abundant number, since it is smaller than the sum of its proper divisors (20896542).

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

17972898 is a wasteful number, since it uses less digits than its factorization.

17972898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322.

The product of its digits is 508032, while the sum is 51.

The square root of 17972898 is about 4239.4454826074. The cubic root of 17972898 is about 261.9425412525.

The spelling of 17972898 in words is "seventeen million, nine hundred seventy-two thousand, eight hundred ninety-eight".