2809268381 has 8 divisors (see below), whose sum is σ = 2912462784. Its totient is φ = 2707725280.

The previous prime is 2809268359. The next prime is 2809268383. The reversal of 2809268381 is 1838629082.

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

It is not a de Polignac number, because 2809268381 - 2¹⁴ = 2809251997 is a prime.

It is a super-2 number, since 2×2809268381² = 15783977672972722322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809268383) 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, 409361 + ... + 416166.

It is an arithmetic number, because the mean of its divisors is an integer number (364057848).

Almost surely, 2^2809268381 is an apocalyptic number.

It is an amenable number.

2809268381 is a deficient number, since it is larger than the sum of its proper divisors (103194403).

2809268381 is an equidigital number, since it uses as much as digits as its factorization.

2809268381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825651.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 2809268381 is about 53002.5318357529. The cubic root of 2809268381 is about 1411.0132014718.

The spelling of 2809268381 in words is "two billion, eight hundred nine million, two hundred sixty-eight thousand, three hundred eighty-one".