189971958 has 32 divisors (see below), whose sum is σ = 418302720. Its totient is φ = 57036960.

The previous prime is 189971933. The next prime is 189971959. The reversal of 189971958 is 859179981.

It is a junction number, because it is equal to n+sod(n) for n = 189971898 and 189971907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189971959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6010 + ... + 20397.

It is an arithmetic number, because the mean of its divisors is an integer number (13071960).

Almost surely, 2^189971958 is an apocalyptic number.

189971958 is an abundant number, since it is smaller than the sum of its proper divisors (228330762).

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

189971958 is a wasteful number, since it uses less digits than its factorization.

189971958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26532.

The product of its digits is 1632960, while the sum is 57.

The square root of 189971958 is about 13783.0315243055. The cubic root of 189971958 is about 574.8614239465.

The spelling of 189971958 in words is "one hundred eighty-nine million, nine hundred seventy-one thousand, nine hundred fifty-eight".