1189021944 has 64 divisors (see below), whose sum is σ = 3246042240. Its totient is φ = 359948160.

The previous prime is 1189021931. The next prime is 1189021979. The reversal of 1189021944 is 4491209811.

It is a congruent number.

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, 389994 + ... + 393030.

It is an arithmetic number, because the mean of its divisors is an integer number (50719410).

Almost surely, 2^1189021944 is an apocalyptic number.

It is an amenable number.

1189021944 is an abundant number, since it is smaller than the sum of its proper divisors (2057020296).

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

1189021944 is a wasteful number, since it uses less digits than its factorization.

1189021944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4536 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1189021944 is about 34482.1974937793. The cubic root of 1189021944 is about 1059.4081019686.

The spelling of 1189021944 in words is "one billion, one hundred eighty-nine million, twenty-one thousand, nine hundred forty-four".