78806 has 16 divisors (see below), whose sum is σ = 145824. Its totient is φ = 31104.

The previous prime is 78803. The next prime is 78809. The reversal of 78806 is 60887.

It is an interprime number because it is at equal distance from previous prime (78803) and next prime (78809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35 + ... + 398.

It is an arithmetic number, because the mean of its divisors is an integer number (9114).

2⁷⁸⁸⁰⁶ is an apocalyptic number.

78806 is a deficient number, since it is larger than the sum of its proper divisors (67018).

78806 is a wasteful number, since it uses less digits than its factorization.

78806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 78806 is about 280.7240638064. The cubic root of 78806 is about 42.8732521451.

The spelling of 78806 in words is "seventy-eight thousand, eight hundred six".