2778630 has 32 divisors (see below), whose sum is σ = 6960384. Its totient is φ = 708576.

The previous prime is 2778619. The next prime is 2778647. The reversal of 2778630 is 368772.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2778591 and 2778600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1324 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (217512).

2^2778630 is an apocalyptic number.

2778630 is an abundant number, since it is smaller than the sum of its proper divisors (4181754).

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

2778630 is a wasteful number, since it uses less digits than its factorization.

2778630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 2778630 is about 1666.9223137267. The cubic root of 2778630 is about 140.5864852549.

The spelling of 2778630 in words is "two million, seven hundred seventy-eight thousand, six hundred thirty".