189896660 has 24 divisors (see below), whose sum is σ = 405323016. Its totient is φ = 74712960.

The previous prime is 189896653. The next prime is 189896687. The reversal of 189896660 is 66698981.

It can be written as a sum of positive squares in 4 ways, for example, as 2808976 + 187087684 = 1676^2 + 13678^2 .

It is a congruent number.

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, 76607 + ... + 79046.

It is an arithmetic number, because the mean of its divisors is an integer number (16888459).

Almost surely, 2^189896660 is an apocalyptic number.

189896660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189896660 is an abundant number, since it is smaller than the sum of its proper divisors (215426356).

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

189896660 is a wasteful number, since it uses less digits than its factorization.

189896660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155723 (or 155721 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 189896660 is about 13780.2997064650. The cubic root of 189896660 is about 574.7854624972.

The spelling of 189896660 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, six hundred sixty".