2856623 has 16 divisors (see below), whose sum is σ = 3718656. Its totient is φ = 2127840.

The previous prime is 2856617. The next prime is 2856653. The reversal of 2856623 is 3266582.

It is not a de Polignac number, because 2856623 - 2⁶ = 2856559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2856623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965 + ... + 2577.

It is an arithmetic number, because the mean of its divisors is an integer number (232416).

2^2856623 is an apocalyptic number.

2856623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2856623 is a deficient number, since it is larger than the sum of its proper divisors (862033).

2856623 is a wasteful number, since it uses less digits than its factorization.

2856623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654.

The product of its digits is 17280, while the sum is 32.

The square root of 2856623 is about 1690.1547266449. The cubic root of 2856623 is about 141.8897345406.

The spelling of 2856623 in words is "two million, eight hundred fifty-six thousand, six hundred twenty-three".