78626 has 4 divisors (see below), whose sum is σ = 117942. Its totient is φ = 39312.

The previous prime is 78623. The next prime is 78643. The reversal of 78626 is 62687.

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., 63001 + 15625 = 251^2 + 125^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 78626.

It is not an unprimeable number, because it can be changed into a prime (78623) 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, 19655 + ... + 19658.

2⁷⁸⁶²⁶ is an apocalyptic number.

78626 is a deficient number, since it is larger than the sum of its proper divisors (39316).

78626 is a wasteful number, since it uses less digits than its factorization.

78626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39315.

The product of its digits is 4032, while the sum is 29.

The square root of 78626 is about 280.4032810079. The cubic root of 78626 is about 42.8405851382.

It can be divided in two parts, 78 and 626, that multiplied together give a triangular number (48828 = T₃₁₂).

The spelling of 78626 in words is "seventy-eight thousand, six hundred twenty-six".