78400308822 has 32 divisors (see below), whose sum is σ = 173116137600. Its totient is φ = 23471430720.

The previous prime is 78400308803. The next prime is 78400308823. The reversal of 78400308822 is 22880300487.

It is a super-2 number, since 2×78400308822² (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 (78400308823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7150447 + ... + 7161402.

It is an arithmetic number, because the mean of its divisors is an integer number (5409879300).

Almost surely, 2^78400308822 is an apocalyptic number.

78400308822 is an abundant number, since it is smaller than the sum of its proper divisors (94715828778).

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

78400308822 is a wasteful number, since it uses less digits than its factorization.

78400308822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14311948.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 78400308822 in words is "seventy-eight billion, four hundred million, three hundred eight thousand, eight hundred twenty-two".