1189639244 has 48 divisors (see below), whose sum is σ = 2184924000. Its totient is φ = 566217216.

The previous prime is 1189639201. The next prime is 1189639271. The reversal of 1189639244 is 4429369811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609427 + ... + 1610165.

It is an arithmetic number, because the mean of its divisors is an integer number (45519250).

Almost surely, 2^1189639244 is an apocalyptic number.

It is an amenable number.

1189639244 is a deficient number, since it is larger than the sum of its proper divisors (995284756).

1189639244 is a wasteful number, since it uses less digits than its factorization.

1189639244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 1000 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1189639244 is about 34491.1473279739. The cubic root of 1189639244 is about 1059.5914065420.

The spelling of 1189639244 in words is "one billion, one hundred eighty-nine million, six hundred thirty-nine thousand, two hundred forty-four".