189947984 has 20 divisors (see below), whose sum is σ = 384026016. Its totient is φ = 90844512.

The previous prime is 189947969. The next prime is 189947993. The reversal of 189947984 is 489749981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257714 + ... + 258449.

Almost surely, 2^189947984 is an apocalyptic number.

It is an amenable number.

189947984 is an abundant number, since it is smaller than the sum of its proper divisors (194078032).

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

189947984 is a wasteful number, since it uses less digits than its factorization.

189947984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516194 (or 516188 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 59.

The square root of 189947984 is about 13782.1618043034. The cubic root of 189947984 is about 574.8372408904.

The spelling of 189947984 in words is "one hundred eighty-nine million, nine hundred forty-seven thousand, nine hundred eighty-four".