1897115198 has 12 divisors (see below), whose sum is σ = 3127888680. Its totient is φ = 862324980.

The previous prime is 1897115179. The next prime is 1897115201. The reversal of 1897115198 is 8915117981.

It is a happy number.

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 5 ways as a sum of consecutive naturals, for example, 3919418 + ... + 3919901.

It is an arithmetic number, because the mean of its divisors is an integer number (260657390).

Almost surely, 2^1897115198 is an apocalyptic number.

1897115198 is a deficient number, since it is larger than the sum of its proper divisors (1230773482).

1897115198 is a wasteful number, since it uses less digits than its factorization.

1897115198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839343 (or 7839332 counting only the distinct ones).

The product of its digits is 181440, while the sum is 50.

The square root of 1897115198 is about 43555.8859168310. The cubic root of 1897115198 is about 1237.9351687650.

The spelling of 1897115198 in words is "one billion, eight hundred ninety-seven million, one hundred fifteen thousand, one hundred ninety-eight".