78422688 has 96 divisors (see below), whose sum is σ = 230731200. Its totient is φ = 25913088.

The previous prime is 78422651. The next prime is 78422711. The reversal of 78422688 is 88622487.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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, 119770 + ... + 120422.

It is an arithmetic number, because the mean of its divisors is an integer number (2403450).

Almost surely, 2^78422688 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 78422688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115365600).

78422688 is an abundant number, since it is smaller than the sum of its proper divisors (152308512).

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

78422688 is a wasteful number, since it uses less digits than its factorization.

78422688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 797 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 78422688 is about 8855.6585300022. The cubic root of 78422688 is about 428.0362737475.

The spelling of 78422688 in words is "seventy-eight million, four hundred twenty-two thousand, six hundred eighty-eight".