189640328 has 8 divisors (see below), whose sum is σ = 355575630. Its totient is φ = 94820160.

The previous prime is 189640291. The next prime is 189640333. The reversal of 189640328 is 823046981.

189640328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 180042724 + 9597604 = 13418^2 + 3098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11852513 + ... + 11852528.

Almost surely, 2^189640328 is an apocalyptic number.

It is an amenable number.

189640328 is a deficient number, since it is larger than the sum of its proper divisors (165935302).

189640328 is a wasteful number, since it uses less digits than its factorization.

189640328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23705047 (or 23705043 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 189640328 is about 13770.9958971746. The cubic root of 189640328 is about 574.5267213294.

It can be divided in two parts, 1896 and 40328, that added together give a palindrome (42224).

The spelling of 189640328 in words is "one hundred eighty-nine million, six hundred forty thousand, three hundred twenty-eight".