2779854 has 48 divisors (see below), whose sum is σ = 6996864. Its totient is φ = 720720.

The previous prime is 2779811. The next prime is 2779859. The reversal of 2779854 is 4589772.

It is a super-2 number, since 2×2779854² = 15455176522632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 2⁹ + 7⁴ + 7⁷ + 9 + 8 + 5⁹ + 4⁴ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4809 + ... + 5355.

It is an arithmetic number, because the mean of its divisors is an integer number (145768).

2^2779854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2779854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3498432).

2779854 is an abundant number, since it is smaller than the sum of its proper divisors (4217010).

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

2779854 is a wasteful number, since it uses less digits than its factorization.

2779854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 570 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 2779854 is about 1667.2894169879. The cubic root of 2779854 is about 140.6071252342.

The spelling of 2779854 in words is "two million, seven hundred seventy-nine thousand, eight hundred fifty-four".