7772222 has 8 divisors (see below), whose sum is σ = 11778816. Its totient is φ = 3845952.

The previous prime is 7772221. The next prime is 7772251. The reversal of 7772222 is 2222777.

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

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7772221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19838 + ... + 20225.

It is an arithmetic number, because the mean of its divisors is an integer number (1472352).

Almost surely, 2^7772222 is an apocalyptic number.

7772222 is a deficient number, since it is larger than the sum of its proper divisors (4006594).

7772222 is a wasteful number, since it uses less digits than its factorization.

7772222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40162.

The product of its digits is 5488, while the sum is 29.

The square root of 7772222 is about 2787.8705134923. The cubic root of 7772222 is about 198.0835446508.

Adding to 7772222 its reverse (2222777), we get a palindrome (9994999).

The spelling of 7772222 in words is "seven million, seven hundred seventy-two thousand, two hundred twenty-two".