2803921920 has 220 divisors, whose sum is σ = 10049156964. Its totient is φ = 747601920.

The previous prime is 2803921909. The next prime is 2803921937. The reversal of 2803921920 is 291293082.

2803921920 is a `hidden beast` number, since 2 + 80 + 392 + 192 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1649009664 + 1154912256 = 40608^2 + 33984^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 411340 + ... + 418100.

Almost surely, 2^2803921920 is an apocalyptic number.

2803921920 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 2803921920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5024578482).

2803921920 is an abundant number, since it is smaller than the sum of its proper divisors (7245235044).

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

2803921920 is an equidigital number, since it uses as much as digits as its factorization.

2803921920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798 (or 6771 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 2803921920 is about 52952.0719141376. The cubic root of 2803921920 is about 1410.1175094460.

The spelling of 2803921920 in words is "two billion, eight hundred three million, nine hundred twenty-one thousand, nine hundred twenty".