189378784 has 24 divisors (see below), whose sum is σ = 426102768. Its totient is φ = 81162240.

The previous prime is 189378769. The next prime is 189378829. The reversal of 189378784 is 487873981.

It is a happy number.

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, 422497 + ... + 422944.

It is an arithmetic number, because the mean of its divisors is an integer number (17754282).

Almost surely, 2^189378784 is an apocalyptic number.

189378784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

189378784 is an abundant number, since it is smaller than the sum of its proper divisors (236723984).

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

189378784 is an equidigital number, since it uses as much as digits as its factorization.

189378784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845458 (or 845450 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 55.

The square root of 189378784 is about 13761.4964302579. The cubic root of 189378784 is about 574.2624787486.

The spelling of 189378784 in words is "one hundred eighty-nine million, three hundred seventy-eight thousand, seven hundred eighty-four".