84321393078 has 64 divisors (see below), whose sum is σ = 189330591744. Its totient is φ = 24859440000.

The previous prime is 84321393073. The next prime is 84321393089. The reversal of 84321393078 is 87039312348.

It is a super-2 number, since 2×84321393078² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84321393073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71583 + ... + 416853.

It is an arithmetic number, because the mean of its divisors is an integer number (2958290496).

Almost surely, 2^84321393078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84321393078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94665295872).

84321393078 is an abundant number, since it is smaller than the sum of its proper divisors (105009198666).

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

84321393078 is a wasteful number, since it uses less digits than its factorization.

84321393078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345421.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 84321393078 in words is "eighty-four billion, three hundred twenty-one million, three hundred ninety-three thousand, seventy-eight".