189278764 has 6 divisors (see below), whose sum is σ = 331237844. Its totient is φ = 94639380.

The previous prime is 189278711. The next prime is 189278797. The reversal of 189278764 is 467872981.

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 as a sum of consecutive naturals, namely, 23659842 + ... + 23659849.

Almost surely, 2^189278764 is an apocalyptic number.

It is an amenable number.

189278764 is a deficient number, since it is larger than the sum of its proper divisors (141959080).

189278764 is a wasteful number, since it uses less digits than its factorization.

189278764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47319695 (or 47319693 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 189278764 is about 13757.8618978386. The cubic root of 189278764 is about 574.1613624449.

It can be divided in two parts, 1892 and 78764, that added together give a square (80656 = 284²).

The spelling of 189278764 in words is "one hundred eighty-nine million, two hundred seventy-eight thousand, seven hundred sixty-four".