2044420400 has 120 divisors (see below), whose sum is σ = 5384290800. Its totient is φ = 739814400.

The previous prime is 2044420361. The next prime is 2044420409. The reversal of 2044420400 is 40244402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2044420409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006586 + ... + 1008614.

It is an arithmetic number, because the mean of its divisors is an integer number (44869090).

Almost surely, 2^2044420400 is an apocalyptic number.

2044420400 is a gapful number since it is divisible by the number (20) 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 2044420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2692145400).

2044420400 is an abundant number, since it is smaller than the sum of its proper divisors (3339870400).

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

2044420400 is a wasteful number, since it uses less digits than its factorization.

2044420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 2044420400 is about 45215.2673330591. The cubic root of 2044420400 is about 1269.1805323810.

Adding to 2044420400 its reverse (40244402), we get a palindrome (2084664802).

The spelling of 2044420400 in words is "two billion, forty-four million, four hundred twenty thousand, four hundred".