189970 has 24 divisors (see below), whose sum is σ = 378252. Its totient is φ = 68640.

The previous prime is 189967. The next prime is 189977. The reversal of 189970 is 79981.

It can be written as a sum of positive squares in 2 ways, for example, as 184041 + 5929 = 429^2 + 77^2 .

It is not an unprimeable number, because it can be changed into a prime (189977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132 + ... + 1288.

2¹⁸⁹⁹⁷⁰ is an apocalyptic number.

189970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189970 is a deficient number, since it is larger than the sum of its proper divisors (188282).

189970 is a wasteful number, since it uses less digits than its factorization.

189970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 189970 is about 435.8554806355. The cubic root of 189970 is about 57.4859448949.

The spelling of 189970 in words is "one hundred eighty-nine thousand, nine hundred seventy".