1189022044 has 72 divisors (see below), whose sum is σ = 2477790000. Its totient is φ = 497645568.

The previous prime is 1189022039. The next prime is 1189022057. The reversal of 1189022044 is 4402209811.

It is a super-2 number, since 2×1189022044² = 2827546842235875872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1189021997 and 1189022015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2647932 + ... + 2648380.

It is an arithmetic number, because the mean of its divisors is an integer number (34413750).

Almost surely, 2^1189022044 is an apocalyptic number.

1189022044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189022044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238895000).

1189022044 is an abundant number, since it is smaller than the sum of its proper divisors (1288767956).

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

1189022044 is a wasteful number, since it uses less digits than its factorization.

1189022044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1189022044 is about 34482.1989438029. The cubic root of 1189022044 is about 1059.4081316683.

The spelling of 1189022044 in words is "one billion, one hundred eighty-nine million, twenty-two thousand, forty-four".