78390321030 has 480 divisors, whose sum is σ = 255199782240. Its totient is φ = 16643128320.

The previous prime is 78390320977. The next prime is 78390321047. The reversal of 78390321030 is 3012309387.

It is a happy number.

It is a super-2 number, since 2×78390321030² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 250448154 + ... + 250448466.

It is an arithmetic number, because the mean of its divisors is an integer number (531666213).

Almost surely, 2^78390321030 is an apocalyptic number.

78390321030 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78390321030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127599891120).

78390321030 is an abundant number, since it is smaller than the sum of its proper divisors (176809461210).

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

78390321030 is a wasteful number, since it uses less digits than its factorization.

78390321030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 78390321030 in words is "seventy-eight billion, three hundred ninety million, three hundred twenty-one thousand, thirty".