78488500398 has 128 divisors (see below), whose sum is σ = 197699014656. Its totient is φ = 20180409600.

The previous prime is 78488500393. The next prime is 78488500417. The reversal of 78488500398 is 89300588487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78488500393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28262386 + ... + 28265162.

It is an arithmetic number, because the mean of its divisors is an integer number (1544523552).

Almost surely, 2^78488500398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78488500398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98849507328).

78488500398 is an abundant number, since it is smaller than the sum of its proper divisors (119210514258).

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

78488500398 is a wasteful number, since it uses less digits than its factorization.

78488500398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 78488500398 in words is "seventy-eight billion, four hundred eighty-eight million, five hundred thousand, three hundred ninety-eight".