78226 has 4 divisors (see below), whose sum is σ = 117342. Its totient is φ = 39112.

The previous prime is 78203. The next prime is 78229. The reversal of 78226 is 62287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62287 = 199 ⋅313.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 2601 = 275^2 + 51^2 .

It is a super-2 number, since 2×78226² = 12238614152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78226.

It is not an unprimeable number, because it can be changed into a prime (78229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19555 + ... + 19558.

2⁷⁸²²⁶ is an apocalyptic number.

78226 is the 150-th centered heptagonal number.

78226 is a deficient number, since it is larger than the sum of its proper divisors (39116).

78226 is a wasteful number, since it uses less digits than its factorization.

78226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39115.

The product of its digits is 1344, while the sum is 25.

The square root of 78226 is about 279.6891131238. The cubic root of 78226 is about 42.7678128748.

It can be divided in two parts, 782 and 26, that added together give a palindrome (808).

The spelling of 78226 in words is "seventy-eight thousand, two hundred twenty-six".