78838535 has 8 divisors (see below), whose sum is σ = 96157536. Its totient is φ = 62036640.

The previous prime is 78838483. The next prime is 78838567. The reversal of 78838535 is 53583887.

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

It is not a de Polignac number, because 78838535 - 2¹⁸ = 78576391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78838535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128939 + ... + 129548.

It is an arithmetic number, because the mean of its divisors is an integer number (12019692).

Almost surely, 2^78838535 is an apocalyptic number.

78838535 is a deficient number, since it is larger than the sum of its proper divisors (17319001).

78838535 is a wasteful number, since it uses less digits than its factorization.

78838535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258553.

The product of its digits is 806400, while the sum is 47.

The square root of 78838535 is about 8879.1066555144. The cubic root of 78838535 is about 428.7915139702.

The spelling of 78838535 in words is "seventy-eight million, eight hundred thirty-eight thousand, five hundred thirty-five".