7222378 has 4 divisors (see below), whose sum is σ = 10833570. Its totient is φ = 3611188.

The previous prime is 7222373. The next prime is 7222379. The reversal of 7222378 is 8732227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4149369 + 3073009 = 2037^2 + 1753^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7222373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805593 + ... + 1805596.

Almost surely, 2^7222378 is an apocalyptic number.

7222378 is a deficient number, since it is larger than the sum of its proper divisors (3611192).

7222378 is a wasteful number, since it uses less digits than its factorization.

7222378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611191.

The product of its digits is 9408, while the sum is 31.

The square root of 7222378 is about 2687.4482320595. The cubic root of 7222378 is about 193.2977229960.

The spelling of 7222378 in words is "seven million, two hundred twenty-two thousand, three hundred seventy-eight".