2804391720 has 320 divisors, whose sum is σ = 10245312000. Its totient is φ = 683914752.

The previous prime is 2804391713. The next prime is 2804391743. The reversal of 2804391720 is 271934082.

It is a super-2 number, since 2×2804391720² = 15729225838409116800, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5854441 + ... + 5854919.

It is an arithmetic number, because the mean of its divisors is an integer number (32016600).

Almost surely, 2^2804391720 is an apocalyptic number.

2804391720 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 2804391720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5122656000).

2804391720 is an abundant number, since it is smaller than the sum of its proper divisors (7440920280).

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

2804391720 is a wasteful number, since it uses less digits than its factorization.

2804391720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2804391720 is about 52956.5078153762. The cubic root of 2804391720 is about 1410.1962605939.

The spelling of 2804391720 in words is "two billion, eight hundred four million, three hundred ninety-one thousand, seven hundred twenty".