2563878 has 16 divisors (see below), whose sum is σ = 5266800. Its totient is φ = 831456.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563878 is 8783652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563877) 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, 5553 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (329175).

2^2563878 is an apocalyptic number.

2563878 is an abundant number, since it is smaller than the sum of its proper divisors (2702922).

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

2563878 is a wasteful number, since it uses less digits than its factorization.

2563878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591.

The product of its digits is 80640, while the sum is 39.

The square root of 2563878 is about 1601.2114163970. The cubic root of 2563878 is about 136.8671167871.

It can be divided in two parts, 25 and 63878, that added together give a triangular number (63903 = T₃₅₇).

The spelling of 2563878 in words is "two million, five hundred sixty-three thousand, eight hundred seventy-eight".