445678 has 4 divisors (see below), whose sum is σ = 668520. Its totient is φ = 222838.

The previous prime is 445657. The next prime is 445691. The reversal of 445678 is 876544.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 4⁸ + 4⁹ + 6³ + 5³ + 7⁶ + 8 .

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111418 + ... + 111421.

It is an arithmetic number, because the mean of its divisors is an integer number (167130).

2⁴⁴⁵⁶⁷⁸ is an apocalyptic number.

445678 is a deficient number, since it is larger than the sum of its proper divisors (222842).

445678 is a wasteful number, since it uses less digits than its factorization.

445678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222841.

The product of its digits is 26880, while the sum is 34.

The square root of 445678 is about 667.5911922726. The cubic root of 445678 is about 76.3848210482.

The spelling of 445678 in words is "four hundred forty-five thousand, six hundred seventy-eight".