2644825920 has 224 divisors, whose sum is σ = 9211885056. Its totient is φ = 637593600.

The previous prime is 2644825889. The next prime is 2644825943. The reversal of 2644825920 is 295284462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2227567 + ... + 2228753.

Almost surely, 2^2644825920 is an apocalyptic number.

2644825920 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 2644825920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4605942528).

2644825920 is an abundant number, since it is smaller than the sum of its proper divisors (6567059136).

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

2644825920 is a wasteful number, since it uses less digits than its factorization.

2644825920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429 (or 1419 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 2644825920 is about 51427.8710428499. The cubic root of 2644825920 is about 1382.9262836168.

The spelling of 2644825920 in words is "two billion, six hundred forty-four million, eight hundred twenty-five thousand, nine hundred twenty".