2222778 has 8 divisors (see below), whose sum is σ = 4445568. Its totient is φ = 740924.

The previous prime is 2222761. The next prime is 2222783. The reversal of 2222778 is 8772222.

It is a sphenic number, since it is the product of 3 distinct primes.

2222778 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 10.

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, 185226 + ... + 185237.

It is an arithmetic number, because the mean of its divisors is an integer number (555696).

2^2222778 is an apocalyptic number.

2222778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2222778 is a wasteful number, since it uses less digits than its factorization.

2222778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370468.

The product of its digits is 6272, while the sum is 30.

The square root of 2222778 is about 1490.8983868795. The cubic root of 2222778 is about 130.5064661143.

The spelling of 2222778 in words is "two million, two hundred twenty-two thousand, seven hundred seventy-eight".