189973170 has 96 divisors (see below), whose sum is σ = 513779760. Its totient is φ = 48660480.

The previous prime is 189973129. The next prime is 189973219. The reversal of 189973170 is 71379981.

It can be written as a sum of positive squares in 8 ways, for example, as 136258929 + 53714241 = 11673^2 + 7329^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 296050 + ... + 296690.

Almost surely, 2^189973170 is an apocalyptic number.

189973170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189973170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256889880).

189973170 is an abundant number, since it is smaller than the sum of its proper divisors (323806590).

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

189973170 is a wasteful number, since it uses less digits than its factorization.

189973170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 189973170 is about 13783.0754913408. The cubic root of 189973170 is about 574.8626464612.

The spelling of 189973170 in words is "one hundred eighty-nine million, nine hundred seventy-three thousand, one hundred seventy".