2778055 has 48 divisors (see below), whose sum is σ = 4432320. Its totient is φ = 1655808.

The previous prime is 2778049. The next prime is 2778067. The reversal of 2778055 is 5508772.

It is not a de Polignac number, because 2778055 - 2⁵ = 2778023 is a prime.

2778055 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2778055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95781 + ... + 95809.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2^2778055 is an apocalyptic number.

2778055 is a deficient number, since it is larger than the sum of its proper divisors (1654265).

2778055 is a wasteful number, since it uses less digits than its factorization.

2778055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 2778055 is about 1666.7498312584. The cubic root of 2778055 is about 140.5767870936.

The spelling of 2778055 in words is "two million, seven hundred seventy-eight thousand, fifty-five".