2778622 has 16 divisors (see below), whose sum is σ = 5196672. Its totient is φ = 1082520.

The previous prime is 2778619. The next prime is 2778647. The reversal of 2778622 is 2268772.

It is a d-powerful number, because it can be written as 2¹⁵ + 7³ + 7⁵ + 8³ + 6⁸ + 2¹⁹ + 2¹⁹ .

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, 8868 + ... + 9175.

It is an arithmetic number, because the mean of its divisors is an integer number (324792).

2^2778622 is an apocalyptic number.

2778622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2778622 is a deficient number, since it is larger than the sum of its proper divisors (2418050).

2778622 is a wasteful number, since it uses less digits than its factorization.

2778622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18063.

The product of its digits is 18816, while the sum is 34.

The square root of 2778622 is about 1666.9199140931. The cubic root of 2778622 is about 140.5863503332.

The spelling of 2778622 in words is "two million, seven hundred seventy-eight thousand, six hundred twenty-two".