7287222 has 32 divisors (see below), whose sum is σ = 15523200. Its totient is φ = 2274048.

The previous prime is 7287211. The next prime is 7287229. The reversal of 7287222 is 2227827.

It is a self number, because there is not a number n which added to its sum of digits gives 7287222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7287229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10729 + ... + 11387.

It is an arithmetic number, because the mean of its divisors is an integer number (485100).

Almost surely, 2^7287222 is an apocalyptic number.

7287222 is an abundant number, since it is smaller than the sum of its proper divisors (8235978).

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

7287222 is a wasteful number, since it uses less digits than its factorization.

7287222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

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

The square root of 7287222 is about 2699.4855065364. The cubic root of 7287222 is about 193.8744892635.

The spelling of 7287222 in words is "seven million, two hundred eighty-seven thousand, two hundred twenty-two".