7822378 has 8 divisors (see below), whose sum is σ = 11782980. Its totient is φ = 3894720.

The previous prime is 7822361. The next prime is 7822379. The reversal of 7822378 is 8732287.

It can be written as a sum of positive squares in 2 ways, for example, as 6365529 + 1456849 = 2523^2 + 1207^2 .

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

It is a super-2 number, since 2×7822378² = 122379195149768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7822379) 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, 7633 + ... + 8596.

Almost surely, 2^7822378 is an apocalyptic number.

7822378 is a deficient number, since it is larger than the sum of its proper divisors (3960602).

7822378 is a wasteful number, since it uses less digits than its factorization.

7822378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16472.

The product of its digits is 37632, while the sum is 37.

The square root of 7822378 is about 2796.8514440349. The cubic root of 7822378 is about 198.5087247951.

Subtracting 7822378 from its reverse (8732287), we obtain a palindrome (909909).

It can be divided in two parts, 782 and 2378, that added together give a triangular number (3160 = T₇₉).

The spelling of 7822378 in words is "seven million, eight hundred twenty-two thousand, three hundred seventy-eight".