78589641 has 16 divisors (see below), whose sum is σ = 113091776. Its totient is φ = 48257856.

The previous prime is 78589631. The next prime is 78589663. The reversal of 78589641 is 14698587.

It is not a de Polignac number, because 78589641 - 2¹⁵ = 78556873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78589631) 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, 18471 + ... + 22323.

It is an arithmetic number, because the mean of its divisors is an integer number (7068236).

Almost surely, 2^78589641 is an apocalyptic number.

It is an amenable number.

78589641 is a deficient number, since it is larger than the sum of its proper divisors (34502135).

78589641 is a wasteful number, since it uses less digits than its factorization.

78589641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392.

The product of its digits is 483840, while the sum is 48.

The square root of 78589641 is about 8865.0798642765. The cubic root of 78589641 is about 428.3398053329.

The spelling of 78589641 in words is "seventy-eight million, five hundred eighty-nine thousand, six hundred forty-one".