2278220 has 24 divisors (see below), whose sum is σ = 5468064. Its totient is φ = 781056.

The previous prime is 2278217. The next prime is 2278229. The reversal of 2278220 is 228722.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2278229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7997 + ... + 8276.

It is an arithmetic number, because the mean of its divisors is an integer number (227836).

2^2278220 is an apocalyptic number.

2278220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2278220 is an abundant number, since it is smaller than the sum of its proper divisors (3189844).

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

2278220 is a wasteful number, since it uses less digits than its factorization.

2278220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16289 (or 16287 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 2278220 is about 1509.3773550706. The cubic root of 2278220 is about 131.5826272094.

The spelling of 2278220 in words is "two million, two hundred seventy-eight thousand, two hundred twenty".