2778180 has 48 divisors (see below), whose sum is σ = 8191680. Its totient is φ = 701568.

The previous prime is 2778173. The next prime is 2778197. The reversal of 2778180 is 818772.

It is a super-2 number, since 2×2778180² = 15436568224800, which contains 22 as substring.

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, 79 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (170660).

2^2778180 is an apocalyptic number.

2778180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2778180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4095840).

2778180 is an abundant number, since it is smaller than the sum of its proper divisors (5413500).

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

2778180 is a wasteful number, since it uses less digits than its factorization.

2778180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 2778180 is about 1666.7873289655. The cubic root of 2778180 is about 140.5788955034.

The spelling of 2778180 in words is "two million, seven hundred seventy-eight thousand, one hundred eighty".