78308600 has 48 divisors (see below), whose sum is σ = 183343920. Its totient is φ = 31104000.

The previous prime is 78308599. The next prime is 78308603. The reversal of 78308600 is 680387.

It is a super-2 number, since 2×78308600² = 12264473667920000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78308603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28904 + ... + 31496.

It is an arithmetic number, because the mean of its divisors is an integer number (3819665).

Almost surely, 2^78308600 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 78308600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91671960).

78308600 is an abundant number, since it is smaller than the sum of its proper divisors (105035320).

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

78308600 is a wasteful number, since it uses less digits than its factorization.

78308600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 78308600 is about 8849.2146544199. The cubic root of 78308600 is about 427.8286063676.

Adding to 78308600 its reverse (680387), we get a palindrome (78988987).

The spelling of 78308600 in words is "seventy-eight million, three hundred eight thousand, six hundred".