198890386770 has 16 divisors (see below), whose sum is σ = 477336928320. Its totient is φ = 53037436464.

The previous prime is 198890386769. The next prime is 198890386801. The reversal of 198890386770 is 77683098891.

It is a super-3 number, since 3×198890386770³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314839750 + ... + 3314839809.

It is an arithmetic number, because the mean of its divisors is an integer number (29833558020).

Almost surely, 2^198890386770 is an apocalyptic number.

198890386770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198890386770 is an abundant number, since it is smaller than the sum of its proper divisors (278446541550).

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

198890386770 is a wasteful number, since it uses less digits than its factorization.

198890386770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629679569.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 198890386770 in words is "one hundred ninety-eight billion, eight hundred ninety million, three hundred eighty-six thousand, seven hundred seventy".