2565838 has 16 divisors (see below), whose sum is σ = 4225536. Its totient is φ = 1158840.

The previous prime is 2565809. The next prime is 2565847. The reversal of 2565838 is 8385652.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2565797 and 2565806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4645 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (264096).

2^2565838 is an apocalyptic number.

2565838 is a deficient number, since it is larger than the sum of its proper divisors (1659698).

2565838 is a wasteful number, since it uses less digits than its factorization.

2565838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its digits is 57600, while the sum is 37.

The square root of 2565838 is about 1601.8233360767. The cubic root of 2565838 is about 136.9019846993.

It can be divided in two parts, 2565 and 838, that added together give a triangular number (3403 = T₈₂).

The spelling of 2565838 in words is "two million, five hundred sixty-five thousand, eight hundred thirty-eight".