2865656 has 32 divisors (see below), whose sum is σ = 5994000. Its totient is φ = 1276416.

The previous prime is 2865641. The next prime is 2865659. The reversal of 2865656 is 6565682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 3138.

2^2865656 is an apocalyptic number.

It is an amenable number.

2865656 is an abundant number, since it is smaller than the sum of its proper divisors (3128344).

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

2865656 is a wasteful number, since it uses less digits than its factorization.

2865656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1147 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 2865656 is about 1692.8248580405. The cubic root of 2865656 is about 142.0391348857.

It can be divided in two parts, 28656 and 56, that multiplied together give a triangular number (1604736 = T₁₇₉₁).

The spelling of 2865656 in words is "two million, eight hundred sixty-five thousand, six hundred fifty-six".