78731258430 has 64 divisors (see below), whose sum is σ = 206476252416. Its totient is φ = 19054560000.

The previous prime is 78731258429. The next prime is 78731258447. The reversal of 78731258430 is 3485213787.

It is a super-2 number, since 2×78731258430² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78731258430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156 + ... + 396815.

It is an arithmetic number, because the mean of its divisors is an integer number (3226191444).

Almost surely, 2^78731258430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78731258430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103238126208).

78731258430 is an abundant number, since it is smaller than the sum of its proper divisors (127744993986).

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

78731258430 is a wasteful number, since it uses less digits than its factorization.

78731258430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397593.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 78731258430 in words is "seventy-eight billion, seven hundred thirty-one million, two hundred fifty-eight thousand, four hundred thirty".