2778958 has 16 divisors (see below), whose sum is σ = 5130720. Its totient is φ = 1099296.

The previous prime is 2778917. The next prime is 2778967. The reversal of 2778958 is 8598772.

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, 7453 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (320670).

2^2778958 is an apocalyptic number.

2778958 is a deficient number, since it is larger than the sum of its proper divisors (2351762).

2778958 is a wasteful number, since it uses less digits than its factorization.

2778958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15291.

The product of its digits is 282240, while the sum is 46.

The square root of 2778958 is about 1667.0206957324. The cubic root of 2778958 is about 140.5920168242.

The spelling of 2778958 in words is "two million, seven hundred seventy-eight thousand, nine hundred fifty-eight".