2778430 has 16 divisors (see below), whose sum is σ = 5065920. Its totient is φ = 1096992.

The previous prime is 2778421. The next prime is 2778439. The reversal of 2778430 is 348772.

It is an interprime number because it is at equal distance from previous prime (2778421) and next prime (2778439).

It is a junction number, because it is equal to n+sod(n) for n = 2778392 and 2778401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969 + ... + 2548.

It is an arithmetic number, because the mean of its divisors is an integer number (316620).

2^2778430 is an apocalyptic number.

2778430 is a deficient number, since it is larger than the sum of its proper divisors (2287490).

2778430 is a wasteful number, since it uses less digits than its factorization.

2778430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 2778430 is about 1666.8623218490. The cubic root of 2778430 is about 140.5831121332.

The spelling of 2778430 in words is "two million, seven hundred seventy-eight thousand, four hundred thirty".