2856386 has 16 divisors (see below), whose sum is σ = 4692408. Its totient is φ = 1296000.

The previous prime is 2856379. The next prime is 2856397. The reversal of 2856386 is 6836582.

2856386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 591361 + 2265025 = 769^2 + 1505^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 2486.

2^2856386 is an apocalyptic number.

2856386 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2856386 is a deficient number, since it is larger than the sum of its proper divisors (1836022).

2856386 is a wasteful number, since it uses less digits than its factorization.

2856386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877.

The product of its digits is 69120, while the sum is 38.

The square root of 2856386 is about 1690.0846132664. The cubic root of 2856386 is about 141.8858104670.

The spelling of 2856386 in words is "two million, eight hundred fifty-six thousand, three hundred eighty-six".