1044431220 has 96 divisors (see below), whose sum is σ = 3347543808. Its totient is φ = 238344192.

The previous prime is 1044431207. The next prime is 1044431237. The reversal of 1044431220 is 221344401.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323052 + ... + 326268.

It is an arithmetic number, because the mean of its divisors is an integer number (34870248).

Almost surely, 2^1044431220 is an apocalyptic number.

1044431220 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 1044431220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673771904).

1044431220 is an abundant number, since it is smaller than the sum of its proper divisors (2303112588).

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

1044431220 is a wasteful number, since it uses less digits than its factorization.

1044431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009 (or 4007 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1044431220 is about 32317.6611158667. The cubic root of 1044431220 is about 1014.5963175857.

Adding to 1044431220 its reverse (221344401), we get a palindrome (1265775621).

The spelling of 1044431220 in words is "one billion, forty-four million, four hundred thirty-one thousand, two hundred twenty".