2856423 has 4 divisors (see below), whose sum is σ = 3808568. Its totient is φ = 1904280.

The previous prime is 2856421. The next prime is 2856431. The reversal of 2856423 is 3246582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2856423 - 2¹ = 2856421 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476068 + ... + 476073.

It is an arithmetic number, because the mean of its divisors is an integer number (952142).

2^2856423 is an apocalyptic number.

2856423 is a deficient number, since it is larger than the sum of its proper divisors (952145).

2856423 is an equidigital number, since it uses as much as digits as its factorization.

2856423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952144.

The product of its digits is 11520, while the sum is 30.

The square root of 2856423 is about 1690.0955594285. The cubic root of 2856423 is about 141.8864231004.

The spelling of 2856423 in words is "two million, eight hundred fifty-six thousand, four hundred twenty-three".