189878830836 has 48 divisors (see below), whose sum is σ = 453907879488. Its totient is φ = 61742252800.

The previous prime is 189878830807. The next prime is 189878830837. The reversal of 189878830836 is 638038878981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189878830837) 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, 6091651 + ... + 6122741.

It is an arithmetic number, because the mean of its divisors is an integer number (9456414156).

Almost surely, 2^189878830836 is an apocalyptic number.

It is an amenable number.

189878830836 is an abundant number, since it is smaller than the sum of its proper divisors (264029048652).

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

189878830836 is a wasteful number, since it uses less digits than its factorization.

189878830836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43552 (or 43550 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 69.

The spelling of 189878830836 in words is "one hundred eighty-nine billion, eight hundred seventy-eight million, eight hundred thirty thousand, eight hundred thirty-six".