7228778 has 16 divisors (see below), whose sum is σ = 11487840. Its totient is φ = 3402000.

The previous prime is 7228769. The next prime is 7228783. The reversal of 7228778 is 8778227.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6353 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (717990).

Almost surely, 2^7228778 is an apocalyptic number.

7228778 is a deficient number, since it is larger than the sum of its proper divisors (4259062).

7228778 is a wasteful number, since it uses less digits than its factorization.

7228778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its digits is 87808, while the sum is 41.

The square root of 7228778 is about 2688.6386890023. The cubic root of 7228778 is about 193.3548020815.

The spelling of 7228778 in words is "seven million, two hundred twenty-eight thousand, seven hundred seventy-eight".