78402226432 has 72 divisors (see below), whose sum is σ = 157610489400. Its totient is φ = 38923223040.

The previous prime is 78402226417. The next prime is 78402226433. The reversal of 78402226432 is 23462220487.

It can be written as a sum of positive squares in 4 ways, for example, as 9388834816 + 69013391616 = 96896^2 + 262704^2 .

It is a super-2 number, since 2×78402226432² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78402226433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48605658 + ... + 48607270.

It is an arithmetic number, because the mean of its divisors is an integer number (2189034575).

Almost surely, 2^78402226432 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 78402226432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78805244700).

78402226432 is an abundant number, since it is smaller than the sum of its proper divisors (79208262968).

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

78402226432 is a wasteful number, since it uses less digits than its factorization.

78402226432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2845 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 78402226432 in words is "seventy-eight billion, four hundred two million, two hundred twenty-six thousand, four hundred thirty-two".