7222388 has 6 divisors (see below), whose sum is σ = 12639186. Its totient is φ = 3611192.

The previous prime is 7222379. The next prime is 7222427. The reversal of 7222388 is 8832227.

It can be written as a sum of positive squares in only one way, i.e., 5654884 + 1567504 = 2378^2 + 1252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902795 + ... + 902802.

It is an arithmetic number, because the mean of its divisors is an integer number (2106531).

Almost surely, 2^7222388 is an apocalyptic number.

It is an amenable number.

7222388 is a deficient number, since it is larger than the sum of its proper divisors (5416798).

7222388 is a wasteful number, since it uses less digits than its factorization.

7222388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805601 (or 1805599 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 7222388 is about 2687.4500925599. The cubic root of 7222388 is about 193.2978122084.

The spelling of 7222388 in words is "seven million, two hundred twenty-two thousand, three hundred eighty-eight".