2850781 has 12 divisors (see below), whose sum is σ = 3165372. Its totient is φ = 2558336.

The previous prime is 2850773. The next prime is 2850797. The reversal of 2850781 is 1870582.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 1779556 = 1035^2 + 1334^2 .

It is not a de Polignac number, because 2850781 - 2³ = 2850773 is a prime.

It is a super-2 number, since 2×2850781² = 16253904619922, 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 (2850761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8835 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (263781).

2^2850781 is an apocalyptic number.

It is an amenable number.

2850781 is a deficient number, since it is larger than the sum of its proper divisors (314591).

2850781 is a wasteful number, since it uses less digits than its factorization.

2850781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2850781 is about 1688.4255980054. The cubic root of 2850781 is about 141.7929436166.

The spelling of 2850781 in words is "two million, eight hundred fifty thousand, seven hundred eighty-one".