2779878 has 8 divisors (see below), whose sum is σ = 5559768. Its totient is φ = 926624.

The previous prime is 2779877. The next prime is 2779939. The reversal of 2779878 is 8789772.

It is a sphenic number, since it is the product of 3 distinct primes.

2779878 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779873) 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, 231651 + ... + 231662.

It is an arithmetic number, because the mean of its divisors is an integer number (694971).

2^2779878 is an apocalyptic number.

2779878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2779878 is a wasteful number, since it uses less digits than its factorization.

2779878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463318.

The product of its digits is 395136, while the sum is 48.

The square root of 2779878 is about 1667.2966142831. The cubic root of 2779878 is about 140.6075298791.

The spelling of 2779878 in words is "two million, seven hundred seventy-nine thousand, eight hundred seventy-eight".