78959638 has 8 divisors (see below), whose sum is σ = 118494288. Its totient is φ = 39461544.

The previous prime is 78959633. The next prime is 78959677. The reversal of 78959638 is 83695987.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78959633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881 + ... + 12892.

It is an arithmetic number, because the mean of its divisors is an integer number (14811786).

Almost surely, 2^78959638 is an apocalyptic number.

78959638 is a deficient number, since it is larger than the sum of its proper divisors (39534650).

78959638 is a wasteful number, since it uses less digits than its factorization.

78959638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18278.

The product of its digits is 3265920, while the sum is 55.

The square root of 78959638 is about 8885.9235873374. The cubic root of 78959638 is about 429.0109556123.

It can be divided in two parts, 78959 and 638, that added together give a palindrome (79597).

The spelling of 78959638 in words is "seventy-eight million, nine hundred fifty-nine thousand, six hundred thirty-eight".