1044011220 has 96 divisors (see below), whose sum is σ = 3345463296. Its totient is φ = 238300800.

The previous prime is 1044011197. The next prime is 1044011237. The reversal of 1044011220 is 221104401.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1044011220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431815 + ... + 434225.

It is an arithmetic number, because the mean of its divisors is an integer number (34848576).

Almost surely, 2^1044011220 is an apocalyptic number.

1044011220 is a gapful number since it is divisible by the number (10) 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 1044011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672731648).

1044011220 is an abundant number, since it is smaller than the sum of its proper divisors (2301452076).

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

1044011220 is a wasteful number, since it uses less digits than its factorization.

1044011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461 (or 3459 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1044011220 is about 32311.1624674817. The cubic root of 1044011220 is about 1014.4602985486.

Adding to 1044011220 its reverse (221104401), we get a palindrome (1265115621).

The spelling of 1044011220 in words is "one billion, forty-four million, eleven thousand, two hundred twenty".