2256783 has 8 divisors (see below), whose sum is σ = 3139968. Its totient is φ = 1439064.

The previous prime is 2256781. The next prime is 2256791. The reversal of 2256783 is 3876522.

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

It is not a de Polignac number, because 2256783 - 2¹ = 2256781 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁷ + 5⁹ + 6⁶ + 7⁶ + 8 + 3⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16285 + ... + 16422.

It is an arithmetic number, because the mean of its divisors is an integer number (392496).

2^2256783 is an apocalyptic number.

2256783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2256783 is a deficient number, since it is larger than the sum of its proper divisors (883185).

2256783 is a wasteful number, since it uses less digits than its factorization.

2256783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32733.

The product of its digits is 20160, while the sum is 33.

The square root of 2256783 is about 1502.2592985234. The cubic root of 2256783 is about 131.1686153055.

Subtracting from 2256783 its sum of digits (33), we obtain a triangular number (2256750 = T₂₁₂₄).

The spelling of 2256783 in words is "two million, two hundred fifty-six thousand, seven hundred eighty-three".