2635864 has 48 divisors (see below), whose sum is σ = 6224400. Its totient is φ = 1024320.

The previous prime is 2635861. The next prime is 2635877. The reversal of 2635864 is 4685362.

It is a happy number.

It is a d-powerful number, because it can be written as 2²¹ + 6 + 3¹² + 5⁵ + 8 + 6² + 4⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2635861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6582 + ... + 6970.

It is an arithmetic number, because the mean of its divisors is an integer number (129675).

2^2635864 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 2635864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3112200).

2635864 is an abundant number, since it is smaller than the sum of its proper divisors (3588536).

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

2635864 is a wasteful number, since it uses less digits than its factorization.

2635864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 409 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 2635864 is about 1623.5344160196. The cubic root of 2635864 is about 138.1362513442.

The spelling of 2635864 in words is "two million, six hundred thirty-five thousand, eight hundred sixty-four".