189989630884 has 27 divisors (see below), whose sum is σ = 339779724193. Its totient is φ = 92953598768.

The previous prime is 189989630867. The next prime is 189989630891. The reversal of 189989630884 is 488036989981.

The square root of 189989630884 is 435878.

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

It can be written as a sum of positive squares in only one way, i.e., 47764102500 + 142225528384 = 218550^2 + 377128^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40970214 + ... + 40974850.

Almost surely, 2^189989630884 is an apocalyptic number.

189989630884 is the 435878-th square number.

It is an amenable number.

189989630884 is a deficient number, since it is larger than the sum of its proper divisors (149790093309).

189989630884 is an frugal number, since it uses more digits than its factorization.

189989630884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372 (or 4686 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 73.

The spelling of 189989630884 in words is "one hundred eighty-nine billion, nine hundred eighty-nine million, six hundred thirty thousand, eight hundred eighty-four".