78589643 has 16 divisors (see below), whose sum is σ = 94176000. Its totient is φ = 64738080.

The previous prime is 78589631. The next prime is 78589663. The reversal of 78589643 is 34698587.

It is not a de Polignac number, because 78589643 - 2⁸ = 78589387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78589591 and 78589600.

It is not an unprimeable number, because it can be changed into a prime (78589613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3368 + ... + 12981.

It is an arithmetic number, because the mean of its divisors is an integer number (5886000).

Almost surely, 2^78589643 is an apocalyptic number.

78589643 is a deficient number, since it is larger than the sum of its proper divisors (15586357).

78589643 is a wasteful number, since it uses less digits than its factorization.

78589643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16402.

The product of its digits is 1451520, while the sum is 50.

The square root of 78589643 is about 8865.0799770786. The cubic root of 78589643 is about 428.3398089664.

The spelling of 78589643 in words is "seventy-eight million, five hundred eighty-nine thousand, six hundred forty-three".