1044021220 has 24 divisors (see below), whose sum is σ = 2391758208. Its totient is φ = 379644000.

The previous prime is 1044021217. The next prime is 1044021229. The reversal of 1044021220 is 221204401.

It is a junction number, because it is equal to n+sod(n) for n = 1044021194 and 1044021203.

It is not an unprimeable number, because it can be changed into a prime (1044021229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372556 + ... + 2372995.

It is an arithmetic number, because the mean of its divisors is an integer number (99656592).

Almost surely, 2^1044021220 is an apocalyptic number.

1044021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1044021220 is an abundant number, since it is smaller than the sum of its proper divisors (1347736988).

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

1044021220 is a wasteful number, since it uses less digits than its factorization.

1044021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745571 (or 4745569 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1044021220 is about 32311.3172123948. The cubic root of 1044021220 is about 1014.4635375210.

Adding to 1044021220 its reverse (221204401), we get a palindrome (1265225621).

The spelling of 1044021220 in words is "one billion, forty-four million, twenty-one thousand, two hundred twenty".