2786220 has 72 divisors (see below), whose sum is σ = 8832096. Its totient is φ = 709632.

The previous prime is 2786219. The next prime is 2786221. The reversal of 2786220 is 226872.

2786220 = T₁₇₁ + T₁₇₂ + ... + T₂₇₈.

2786220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2786219) and next prime (2786221).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2786221) 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, 3804 + ... + 4476.

It is an arithmetic number, because the mean of its divisors is an integer number (122668).

2^2786220 is an apocalyptic number.

2786220 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 2786220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4416048).

2786220 is an abundant number, since it is smaller than the sum of its proper divisors (6045876).

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

2786220 is a wasteful number, since it uses less digits than its factorization.

2786220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2786220 is about 1669.1974119319. The cubic root of 2786220 is about 140.7143757768.

The spelling of 2786220 in words is "two million, seven hundred eighty-six thousand, two hundred twenty".