1165722444 has 72 divisors (see below), whose sum is σ = 3076153808. Its totient is φ = 371848320.

The previous prime is 1165722443. The next prime is 1165722491. The reversal of 1165722444 is 4442275611.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1165722399 and 1165722408.

It is not an unprimeable number, because it can be changed into a prime (1165722443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74079 + ... + 88425.

Almost surely, 2^1165722444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165722444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538076904).

1165722444 is an abundant number, since it is smaller than the sum of its proper divisors (1910431364).

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

1165722444 is a wasteful number, since it uses less digits than its factorization.

1165722444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14455 (or 14450 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 1165722444 is about 34142.6777508736. The cubic root of 1165722444 is about 1052.4425205810.

The spelling of 1165722444 in words is "one billion, one hundred sixty-five million, seven hundred twenty-two thousand, four hundred forty-four".