1023856 has 20 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 505472.

The previous prime is 1023851. The next prime is 1023857. The reversal of 1023856 is 6583201.

It is a happy number.

It is a super-2 number, since 2×1023856² = 2096562217472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1023856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023851) 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 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 1783.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

2^1023856 is an apocalyptic number.

1023856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1023856 is a deficient number, since it is larger than the sum of its proper divisors (984944).

1023856 is an equidigital number, since it uses as much as digits as its factorization.

1023856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1023856 is about 1011.8576975049. The cubic root of 1023856 is about 100.7889590662.

The spelling of 1023856 in words is "one million, twenty-three thousand, eight hundred fifty-six".