2806233781 has 8 divisors (see below), whose sum is σ = 3024631064. Its totient is φ = 2588198400.

The previous prime is 2806233779. The next prime is 2806233797. The reversal of 2806233781 is 1873326082.

It can be written as a sum of positive squares in 4 ways, for example, as 2531281 + 2803702500 = 1591^2 + 52950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2806233781 - 2¹ = 2806233779 is a prime.

It is a super-2 number, since 2×2806233781² = 15749896067251111922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806233721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74256 + ... + 105481.

It is an arithmetic number, because the mean of its divisors is an integer number (378078883).

Almost surely, 2^2806233781 is an apocalyptic number.

It is an amenable number.

2806233781 is a deficient number, since it is larger than the sum of its proper divisors (218397283).

2806233781 is a wasteful number, since it uses less digits than its factorization.

2806233781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180951.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 2806233781 is about 52973.8971664347. The cubic root of 2806233781 is about 1410.5049548662.

The spelling of 2806233781 in words is "two billion, eight hundred six million, two hundred thirty-three thousand, seven hundred eighty-one".