2778288 has 20 divisors (see below), whose sum is σ = 7177368. Its totient is φ = 926080.

The previous prime is 2778277. The next prime is 2778299. The reversal of 2778288 is 8828772.

It is an interprime number because it is at equal distance from previous prime (2778277) and next prime (2778299).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28893 + ... + 28988.

2^2778288 is an apocalyptic number.

It is an amenable number.

2778288 is an abundant number, since it is smaller than the sum of its proper divisors (4399080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2778288 is a wasteful number, since it uses less digits than its factorization.

2778288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57892 (or 57886 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 2778288 is about 1666.8197263052. The cubic root of 2778288 is about 140.5807171185.

The spelling of 2778288 in words is "two million, seven hundred seventy-eight thousand, two hundred eighty-eight".