78866424 has 96 divisors (see below), whose sum is σ = 262909920. Its totient is φ = 20798208.

The previous prime is 78866419. The next prime is 78866441. The reversal of 78866424 is 42466887.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 78866424.

It is a congruent number.

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, 534 + ... + 12570.

It is an arithmetic number, because the mean of its divisors is an integer number (2738645).

Almost surely, 2^78866424 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 78866424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131454960).

78866424 is an abundant number, since it is smaller than the sum of its proper divisors (184043496).

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

78866424 is a wasteful number, since it uses less digits than its factorization.

78866424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12069 (or 12062 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 78866424 is about 8880.6770012201. The cubic root of 78866424 is about 428.8420694365.

The spelling of 78866424 in words is "seventy-eight million, eight hundred sixty-six thousand, four hundred twenty-four".