2778340444 has 48 divisors (see below), whose sum is σ = 5404694400. Its totient is φ = 1239019200.

The previous prime is 2778340403. The next prime is 2778340457. The reversal of 2778340444 is 4440438772.

It is a happy number.

It is a super-2 number, since 2×2778340444² = 15438351245532234272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2778340444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151439 + ... + 2152729.

It is an arithmetic number, because the mean of its divisors is an integer number (112597800).

Almost surely, 2^2778340444 is an apocalyptic number.

It is an amenable number.

2778340444 is a deficient number, since it is larger than the sum of its proper divisors (2626353956).

2778340444 is a wasteful number, since it uses less digits than its factorization.

2778340444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 43.

The square root of 2778340444 is about 52709.9653196623. The cubic root of 2778340444 is about 1405.8160166427.

The spelling of 2778340444 in words is "two billion, seven hundred seventy-eight million, three hundred forty thousand, four hundred forty-four".