189478312 has 8 divisors (see below), whose sum is σ = 355271850. Its totient is φ = 94739152.

The previous prime is 189478283. The next prime is 189478313. The reversal of 189478312 is 213874981.

189478312 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., 149964516 + 39513796 = 12246^2 + 6286^2 .

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

It is not an unprimeable number, because it can be changed into a prime (189478313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11842387 + ... + 11842402.

Almost surely, 2^189478312 is an apocalyptic number.

It is an amenable number.

189478312 is a deficient number, since it is larger than the sum of its proper divisors (165793538).

189478312 is a wasteful number, since it uses less digits than its factorization.

189478312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23684795 (or 23684791 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 189478312 is about 13765.1121317627. The cubic root of 189478312 is about 574.3630623252.

It can be divided in two parts, 1894783 and 12, that multiplied together give a triangular number (22737396 = T₆₇₄₃).

The spelling of 189478312 in words is "one hundred eighty-nine million, four hundred seventy-eight thousand, three hundred twelve".