2778904 has 16 divisors (see below), whose sum is σ = 5277600. Its totient is φ = 1371552.

The previous prime is 2778901. The next prime is 2778907. The reversal of 2778904 is 4098772.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2778901) and next prime (2778907).

It is a pancake number, because a pancake can be divided into 2778904 parts by 2357 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778901) 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, 1567 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (329850).

2^2778904 is an apocalyptic number.

It is an amenable number.

2778904 is a deficient number, since it is larger than the sum of its proper divisors (2498696).

2778904 is a wasteful number, since it uses less digits than its factorization.

2778904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482 (or 4478 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 2778904 is about 1667.0044990941. The cubic root of 2778904 is about 140.5911061689.

The spelling of 2778904 in words is "two million, seven hundred seventy-eight thousand, nine hundred four".