43678 has 4 divisors (see below), whose sum is σ = 65520. Its totient is φ = 21838.

The previous prime is 43669. The next prime is 43691. The reversal of 43678 is 87634.

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

It is a d-powerful number, because it can be written as 4 + 3⁶ + 6⁵ + 7⁴ + 8⁵ .

It is an alternating number because its digits alternate between even and odd.

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, 10918 + ... + 10921.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2⁴³⁶⁷⁸ is an apocalyptic number.

43678 is a deficient number, since it is larger than the sum of its proper divisors (21842).

43678 is a wasteful number, since it uses less digits than its factorization.

43678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21841.

The product of its digits is 4032, while the sum is 28.

The square root of 43678 is about 208.9928228433. The cubic root of 43678 is about 35.2171533132.

Subtracting 43678 from its reverse (87634), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 43678 in words is "forty-three thousand, six hundred seventy-eight".