78226420488 has 32 divisors (see below), whose sum is σ = 197058929760. Its totient is φ = 25876423040.

The previous prime is 78226420487. The next prime is 78226420543. The reversal of 78226420488 is 88402462287.

It is a super-2 number, since 2×78226420488² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78226420488.

It is not an unprimeable number, because it can be changed into a prime (78226420487) 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, 12437445 + ... + 12443732.

It is an arithmetic number, because the mean of its divisors is an integer number (6158091555).

Almost surely, 2^78226420488 is an apocalyptic number.

It is an amenable number.

78226420488 is an abundant number, since it is smaller than the sum of its proper divisors (118832509272).

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

78226420488 is a wasteful number, since it uses less digits than its factorization.

78226420488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24881317 (or 24881313 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 51.

The spelling of 78226420488 in words is "seventy-eight billion, two hundred twenty-six million, four hundred twenty thousand, four hundred eighty-eight".