78422064 has 80 divisors (see below), whose sum is σ = 239032320. Its totient is φ = 21680640.

The previous prime is 78422059. The next prime is 78422077. The reversal of 78422064 is 46022487.

It is a super-3 number, since 3×78422064³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6652 + ... + 14180.

It is an arithmetic number, because the mean of its divisors is an integer number (2987904).

Almost surely, 2^78422064 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 78422064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119516160).

78422064 is an abundant number, since it is smaller than the sum of its proper divisors (160610256).

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

78422064 is a wasteful number, since it uses less digits than its factorization.

78422064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578 (or 7572 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 78422064 is about 8855.6232982213. The cubic root of 78422064 is about 428.0351384666.

The spelling of 78422064 in words is "seventy-eight million, four hundred twenty-two thousand, sixty-four".