2663856 has 60 divisors (see below), whose sum is σ = 8034208. Its totient is φ = 819072.

The previous prime is 2663831. The next prime is 2663867. The reversal of 2663856 is 6583662.

2663856 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×2663856² = 14192257577472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2¹⁹ + 6³ + 6⁴ + 3¹¹ + 8 + 5⁹ + 6⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 2663856.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161 + ... + 2583.

2^2663856 is an apocalyptic number.

2663856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2663856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4017104).

2663856 is an abundant number, since it is smaller than the sum of its proper divisors (5370352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2663856 is a wasteful number, since it uses less digits than its factorization.

2663856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1441 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2663856 is about 1632.1323475748. The cubic root of 2663856 is about 138.6235175575.

The spelling of 2663856 in words is "two million, six hundred sixty-three thousand, eight hundred fifty-six".