189039744 has 80 divisors (see below), whose sum is σ = 562610070. Its totient is φ = 63009792.

The previous prime is 189039743. The next prime is 189039749. The reversal of 189039744 is 447930981.

It can be written as a sum of positive squares in only one way, i.e., 151585344 + 37454400 = 12312^2 + 6120^2 .

It is a super-3 number, since 3×189039744³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189039744.

It is not an unprimeable number, because it can be changed into a prime (189039743) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1252 + ... + 19484.

Almost surely, 2^189039744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189039744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281305035).

189039744 is an abundant number, since it is smaller than the sum of its proper divisors (373570326).

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

189039744 is an equidigital number, since it uses as much as digits as its factorization.

189039744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18259 (or 18238 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 189039744 is about 13749.1724841897. The cubic root of 189039744 is about 573.9195782224.

The spelling of 189039744 in words is "one hundred eighty-nine million, thirty-nine thousand, seven hundred forty-four".