78446 has 8 divisors (see below), whose sum is σ = 119784. Its totient is φ = 38520.

The previous prime is 78439. The next prime is 78467. The reversal of 78446 is 64487.

78446 is nontrivially palindromic in base 11.

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

It is a congruent number.

It is an unprimeable number.

78446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200 + ... + 443.

It is an arithmetic number, because the mean of its divisors is an integer number (14973).

2⁷⁸⁴⁴⁶ is an apocalyptic number.

78446 is a deficient number, since it is larger than the sum of its proper divisors (41338).

78446 is a wasteful number, since it uses less digits than its factorization.

78446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its digits is 5376, while the sum is 29.

The square root of 78446 is about 280.0821308117. The cubic root of 78446 is about 42.8078682364.

The spelling of 78446 in words is "seventy-eight thousand, four hundred forty-six".