78505308 has 48 divisors (see below), whose sum is σ = 232610560. Its totient is φ = 22429872.

The previous prime is 78505277. The next prime is 78505309. The reversal of 78505308 is 80350587.

It is a happy number.

78505308 is a `hidden beast` number, since 78 + 50 + 530 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78505309) 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, 51166 + ... + 52677.

Almost surely, 2^78505308 is an apocalyptic number.

It is an amenable number.

78505308 is an abundant number, since it is smaller than the sum of its proper divisors (154105252).

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

78505308 is a wasteful number, since it uses less digits than its factorization.

78505308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103863 (or 103855 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 78505308 is about 8860.3221160407. The cubic root of 78505308 is about 428.1865361527.

The spelling of 78505308 in words is "seventy-eight million, five hundred five thousand, three hundred eight".