2840847920 has 20 divisors (see below), whose sum is σ = 6604971600. Its totient is φ = 1136339136.

The previous prime is 2840847913. The next prime is 2840847923. The reversal of 2840847920 is 297480482.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2840847923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17755220 + ... + 17755379.

It is an arithmetic number, because the mean of its divisors is an integer number (330248580).

Almost surely, 2^2840847920 is an apocalyptic number.

2840847920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2840847920 is an abundant number, since it is smaller than the sum of its proper divisors (3764123680).

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

2840847920 is a wasteful number, since it uses less digits than its factorization.

2840847920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35510612 (or 35510606 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 2840847920 is about 53299.6052518215. The cubic root of 2840847920 is about 1416.2806720168.

The spelling of 2840847920 in words is "two billion, eight hundred forty million, eight hundred forty-seven thousand, nine hundred twenty".