189025986 has 32 divisors (see below), whose sum is σ = 386519040. Its totient is φ = 61613136.

The previous prime is 189025957. The next prime is 189025987. The reversal of 189025986 is 689520981.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (189025987) 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, 48855 + ... + 52581.

It is an arithmetic number, because the mean of its divisors is an integer number (12078720).

Almost surely, 2^189025986 is an apocalyptic number.

189025986 is an abundant number, since it is smaller than the sum of its proper divisors (197493054).

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

189025986 is a wasteful number, since it uses less digits than its factorization.

189025986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 189025986 is about 13748.6721540664. The cubic root of 189025986 is about 573.9056549120.

The spelling of 189025986 in words is "one hundred eighty-nine million, twenty-five thousand, nine hundred eighty-six".