78450688 has 52 divisors (see below), whose sum is σ = 159233040. Its totient is φ = 38641664.

The previous prime is 78450667. The next prime is 78450689. The reversal of 78450688 is 88605487.

It is not an unprimeable number, because it can be changed into a prime (78450689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438183 + ... + 438361.

Almost surely, 2^78450688 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 78450688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79616520).

78450688 is an abundant number, since it is smaller than the sum of its proper divisors (80782352).

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

78450688 is a wasteful number, since it uses less digits than its factorization.

78450688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 78450688 is about 8857.2392990141. The cubic root of 78450688 is about 428.0872096432.

The spelling of 78450688 in words is "seventy-eight million, four hundred fifty thousand, six hundred eighty-eight".