189685428 has 24 divisors (see below), whose sum is σ = 442884288. Its totient is φ = 63187776.

The previous prime is 189685411. The next prime is 189685451. The reversal of 189685428 is 824586981.

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, 18825 + ... + 27087.

It is an arithmetic number, because the mean of its divisors is an integer number (18453512).

Almost surely, 2^189685428 is an apocalyptic number.

It is an amenable number.

189685428 is an abundant number, since it is smaller than the sum of its proper divisors (253198860).

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

189685428 is a wasteful number, since it uses less digits than its factorization.

189685428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10183 (or 10181 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 189685428 is about 13772.6332994094. The cubic root of 189685428 is about 574.5722621023.

The spelling of 189685428 in words is "one hundred eighty-nine million, six hundred eighty-five thousand, four hundred twenty-eight".