2778772 has 12 divisors (see below), whose sum is σ = 4900896. Its totient is φ = 1378520.

The previous prime is 2778739. The next prime is 2778779.

2778772 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128 + ... + 3175.

It is an arithmetic number, because the mean of its divisors is an integer number (408408).

2^2778772 is an apocalyptic number.

It is an amenable number.

2778772 is a deficient number, since it is larger than the sum of its proper divisors (2122124).

2778772 is a wasteful number, since it uses less digits than its factorization.

2778772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438 (or 5436 counting only the distinct ones).

The product of its digits is 76832, while the sum is 40.

The square root of 2778772 is about 1666.9649066492. The cubic root of 2778772 is about 140.5888800731.

The spelling of 2778772 in words is "two million, seven hundred seventy-eight thousand, seven hundred seventy-two".