2805906798 has 64 divisors (see below), whose sum is σ = 6326449920. Its totient is φ = 921697056.

The previous prime is 2805906793. The next prime is 2805906799. The reversal of 2805906798 is 8976095082.

It is a happy number.

It is a super-2 number, since 2×2805906798² = 15746225918125225608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805906793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3392461 + ... + 3393287.

It is an arithmetic number, because the mean of its divisors is an integer number (98850780).

Almost surely, 2^2805906798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2805906798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3163224960).

2805906798 is an abundant number, since it is smaller than the sum of its proper divisors (3520543122).

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

2805906798 is a wasteful number, since it uses less digits than its factorization.

2805906798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 2805906798 is about 52970.8108112383. The cubic root of 2805906798 is about 1410.4501686186.

The spelling of 2805906798 in words is "two billion, eight hundred five million, nine hundred six thousand, seven hundred ninety-eight".