1149220044 has 72 divisors (see below), whose sum is σ = 3337312160. Its totient is φ = 326633472.

The previous prime is 1149219949. The next prime is 1149220063. The reversal of 1149220044 is 4400229411.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36822 + ... + 60450.

Almost surely, 2^1149220044 is an apocalyptic number.

1149220044 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 1149220044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1668656080).

1149220044 is an abundant number, since it is smaller than the sum of its proper divisors (2188092116).

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

1149220044 is a wasteful number, since it uses less digits than its factorization.

1149220044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23839 (or 23834 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1149220044 is about 33900.1481412692. The cubic root of 1149220044 is about 1047.4526440239.

Adding to 1149220044 its reverse (4400229411), we get a palindrome (5549449455).

The spelling of 1149220044 in words is "one billion, one hundred forty-nine million, two hundred twenty thousand, forty-four".