2563956 has 36 divisors (see below), whose sum is σ = 6584032. Its totient is φ = 841104.

The previous prime is 2563943. The next prime is 2563969. The reversal of 2563956 is 6593652.

2563956 is a `hidden beast` number, since 2 + 563 + 95 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (2563943) and next prime (2563969).

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 2563956.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1881 + ... + 2943.

2^2563956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2563956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3292016).

2563956 is an abundant number, since it is smaller than the sum of its proper divisors (4020076).

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

2563956 is a wasteful number, since it uses less digits than its factorization.

2563956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1135 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 2563956 is about 1601.2357727705. The cubic root of 2563956 is about 136.8685047271.

The spelling of 2563956 in words is "two million, five hundred sixty-three thousand, nine hundred fifty-six".