78238688 has 24 divisors (see below), whose sum is σ = 168036120. Its totient is φ = 35562880.

The previous prime is 78238679. The next prime is 78238703. The reversal of 78238688 is 88683287.

It is a super-2 number, since 2×78238688² = 12242584599922688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110783 + ... + 111486.

It is an arithmetic number, because the mean of its divisors is an integer number (7001505).

Almost surely, 2^78238688 is an apocalyptic number.

It is an amenable number.

78238688 is an abundant number, since it is smaller than the sum of its proper divisors (89797432).

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

78238688 is a wasteful number, since it uses less digits than its factorization.

78238688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222290 (or 222282 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 50.

The square root of 78238688 is about 8845.2635913239. The cubic root of 78238688 is about 427.7012501597.

The spelling of 78238688 in words is "seventy-eight million, two hundred thirty-eight thousand, six hundred eighty-eight".