198889402 has 16 divisors (see below), whose sum is σ = 306246024. Its totient is φ = 96840000.

The previous prime is 198889399. The next prime is 198889417. The reversal of 198889402 is 204988891.

It can be written as a sum of positive squares in 4 ways, for example, as 161569521 + 37319881 = 12711^2 + 6109^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4252 + ... + 20392.

Almost surely, 2^198889402 is an apocalyptic number.

198889402 is a deficient number, since it is larger than the sum of its proper divisors (107356622).

198889402 is a wasteful number, since it uses less digits than its factorization.

198889402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16305.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 198889402 is about 14102.8153926796. The cubic root of 198889402 is about 583.7190683737.

The spelling of 198889402 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, four hundred two".