189428634756 has 135 divisors (see below), whose sum is σ = 510795237043. Its totient is φ = 59191824000.

The previous prime is 189428634749. The next prime is 189428634757. The reversal of 189428634756 is 657436824981.

The square root of 189428634756 is 435234.

It is a perfect power (a square), and thus also a powerful number.

189428634756 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 286 + 347 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58789761156 + 130638873600 = 242466^2 + 361440^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189428634693 and 189428634702.

It is not an unprimeable number, because it can be changed into a prime (189428634757) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 754695631 + ... + 754695881.

Almost surely, 2^189428634756 is an apocalyptic number.

189428634756 is the 435234-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189428634756

189428634756 is an abundant number, since it is smaller than the sum of its proper divisors (321366602287).

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

189428634756 is an frugal number, since it uses more digits than its factorization.

189428634756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 273 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 189428634756 in words is "one hundred eighty-nine billion, four hundred twenty-eight million, six hundred thirty-four thousand, seven hundred fifty-six".