2778582 has 16 divisors (see below), whose sum is σ = 5884272. Its totient is φ = 871680.

The previous prime is 2778547. The next prime is 2778583. The reversal of 2778582 is 2858772.

It is a self number, because there is not a number n which added to its sum of digits gives 2778582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778583) 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, 13519 + ... + 13722.

It is an arithmetic number, because the mean of its divisors is an integer number (367767).

2^2778582 is an apocalyptic number.

2778582 is an abundant number, since it is smaller than the sum of its proper divisors (3105690).

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

2778582 is a wasteful number, since it uses less digits than its factorization.

2778582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27263.

The product of its digits is 62720, while the sum is 39.

The square root of 2778582 is about 1666.9079158730. The cubic root of 2778582 is about 140.5856757205.

The spelling of 2778582 in words is "two million, seven hundred seventy-eight thousand, five hundred eighty-two".