78851238 has 16 divisors (see below), whose sum is σ = 159234816. Its totient is φ = 26028360.

The previous prime is 78851233. The next prime is 78851257. The reversal of 78851238 is 83215887.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78851238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78851231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63178 + ... + 64413.

It is an arithmetic number, because the mean of its divisors is an integer number (9952176).

Almost surely, 2^78851238 is an apocalyptic number.

78851238 is an abundant number, since it is smaller than the sum of its proper divisors (80383578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78851238 is a wasteful number, since it uses less digits than its factorization.

78851238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127699.

The product of its digits is 107520, while the sum is 42.

The square root of 78851238 is about 8879.8219576746. The cubic root of 78851238 is about 428.8145426667.

The spelling of 78851238 in words is "seventy-eight million, eight hundred fifty-one thousand, two hundred thirty-eight".