2222378 has 4 divisors (see below), whose sum is σ = 3333570. Its totient is φ = 1111188.

The previous prime is 2222377. The next prime is 2222383. The reversal of 2222378 is 8732222.

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., 1545049 + 677329 = 1243^2 + 823^2 .

It is a d-powerful number, because it can be written as 2⁴ + 2⁹ + 2¹⁶ + 2²¹ + 3¹⁰ + 7² + 8² .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2222377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555593 + ... + 555596.

2^2222378 is an apocalyptic number.

2222378 is a deficient number, since it is larger than the sum of its proper divisors (1111192).

2222378 is a wasteful number, since it uses less digits than its factorization.

2222378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111191.

The product of its digits is 2688, while the sum is 26.

The square root of 2222378 is about 1490.7642335393. The cubic root of 2222378 is about 130.4986372146.

The spelling of 2222378 in words is "two million, two hundred twenty-two thousand, three hundred seventy-eight".