78508620 has 72 divisors (see below), whose sum is σ = 241200960. Its totient is φ = 20666880.

The previous prime is 78508609. The next prime is 78508643. The reversal of 78508620 is 2680587.

78508620 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

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

78508620 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11460 + ... + 16980.

Almost surely, 2^78508620 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 78508620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120600480).

78508620 is an abundant number, since it is smaller than the sum of its proper divisors (162692340).

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

78508620 is a wasteful number, since it uses less digits than its factorization.

78508620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615 (or 5610 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 78508620 is about 8860.5090147237. The cubic root of 78508620 is about 428.1925575454.

The spelling of 78508620 in words is "seventy-eight million, five hundred eight thousand, six hundred twenty".