189487872 has 216 divisors, whose sum is σ = 646231040. Its totient is φ = 52254720.

The previous prime is 189487871. The next prime is 189487873. The reversal of 189487872 is 278784981.

It is a happy number.

189487872 is a `hidden beast` number, since 1 + 89 + 487 + 87 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (189487871) and next prime (189487873).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (189487871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499779 + ... + 500157.

Almost surely, 2^189487872 is an apocalyptic number.

189487872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189487872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323115520).

189487872 is an abundant number, since it is smaller than the sum of its proper divisors (456743168).

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

189487872 is a wasteful number, since it uses less digits than its factorization.

189487872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 422 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 189487872 is about 13765.4593820911. The cubic root of 189487872 is about 574.3727218626.

The spelling of 189487872 in words is "one hundred eighty-nine million, four hundred eighty-seven thousand, eight hundred seventy-two".