1044423720 has 128 divisors (see below), whose sum is σ = 3524688000. Its totient is φ = 278489664.

The previous prime is 1044423701. The next prime is 1044423727. The reversal of 1044423720 is 273244401.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044423727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81511 + ... + 93449.

It is an arithmetic number, because the mean of its divisors is an integer number (27536625).

Almost surely, 2^1044423720 is an apocalyptic number.

1044423720 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 1044423720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762344000).

1044423720 is an abundant number, since it is smaller than the sum of its proper divisors (2480264280).

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

1044423720 is an equidigital number, since it uses as much as digits as its factorization.

1044423720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11971 (or 11949 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 1044423720 is about 32317.5450800335. The cubic root of 1044423720 is about 1014.5938889941.

The spelling of 1044423720 in words is "one billion, forty-four million, four hundred twenty-three thousand, seven hundred twenty".