2770220 has 12 divisors (see below), whose sum is σ = 5817504. Its totient is φ = 1108080.

The previous prime is 2770217. The next prime is 2770231. The reversal of 2770220 is 220772.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 138511 = 2770220 / (2 + 7 + 7 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2770192 and 2770201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69236 + ... + 69275.

It is an arithmetic number, because the mean of its divisors is an integer number (484792).

2^2770220 is an apocalyptic number.

2770220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2770220 is an abundant number, since it is smaller than the sum of its proper divisors (3047284).

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

2770220 is a wasteful number, since it uses less digits than its factorization.

2770220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138520 (or 138518 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 2770220 is about 1664.3977889916. The cubic root of 2770220 is about 140.4445055509. Note that the first 3 decimals are identical.

Adding to 2770220 its reverse (220772), we get a palindrome (2990992).

The spelling of 2770220 in words is "two million, seven hundred seventy thousand, two hundred twenty".