189678240 has 288 divisors, whose sum is σ = 702354240. Its totient is φ = 47798784.

The previous prime is 189678227. The next prime is 189678257. The reversal of 189678240 is 42876981.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2285239 + ... + 2285321.

It is an arithmetic number, because the mean of its divisors is an integer number (2438730).

Almost surely, 2^189678240 is an apocalyptic number.

189678240 is a gapful number since it is divisible by the number (10) 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 189678240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351177120).

189678240 is an abundant number, since it is smaller than the sum of its proper divisors (512676000).

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

189678240 is a wasteful number, since it uses less digits than its factorization.

189678240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 189678240 is about 13772.3723446616. The cubic root of 189678240 is about 574.5650043359.

The spelling of 189678240 in words is "one hundred eighty-nine million, six hundred seventy-eight thousand, two hundred forty".