78345284928 has 112 divisors (see below), whose sum is σ = 221577261696. Its totient is φ = 24370339840.

The previous prime is 78345284909. The next prime is 78345284933. The reversal of 78345284928 is 82948254387.

It is a super-2 number, since 2×78345284928² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35301 + ... + 397412.

It is an arithmetic number, because the mean of its divisors is an integer number (1978368408).

Almost surely, 2^78345284928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78345284928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110788630848).

78345284928 is an abundant number, since it is smaller than the sum of its proper divisors (143231976768).

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

78345284928 is a wasteful number, since it uses less digits than its factorization.

78345284928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432792 (or 432782 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 60.

The spelling of 78345284928 in words is "seventy-eight billion, three hundred forty-five million, two hundred eighty-four thousand, nine hundred twenty-eight".