1044368640 has 360 divisors, whose sum is σ = 4273758720. Its totient is φ = 238546944.

The previous prime is 1044368621. The next prime is 1044368653. The reversal of 1044368640 is 468634401.

1044368640 is a `hidden beast` number, since 1 + 0 + 4 + 4 + 3 + 6 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1044368595 and 1044368604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 725041 + ... + 726479.

It is an arithmetic number, because the mean of its divisors is an integer number (11871552).

Almost surely, 2^1044368640 is an apocalyptic number.

1044368640 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 1044368640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136879360).

1044368640 is an abundant number, since it is smaller than the sum of its proper divisors (3229390080).

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

1044368640 is an equidigital number, since it uses as much as digits as its factorization.

1044368640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1044368640 is about 32316.6929001097. The cubic root of 1044368640 is about 1014.5760530613.

The spelling of 1044368640 in words is "one billion, forty-four million, three hundred sixty-eight thousand, six hundred forty".