78065424 has 80 divisors (see below), whose sum is σ = 225699840. Its totient is φ = 25833600.

The previous prime is 78065417. The next prime is 78065441. The reversal of 78065424 is 42456087.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67249 + ... + 68399.

It is an arithmetic number, because the mean of its divisors is an integer number (2821248).

Almost surely, 2^78065424 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 78065424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112849920).

78065424 is an abundant number, since it is smaller than the sum of its proper divisors (147634416).

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

78065424 is a wasteful number, since it uses less digits than its factorization.

78065424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 78065424 is about 8835.4639946072. The cubic root of 78065424 is about 427.3852939403.

The spelling of 78065424 in words is "seventy-eight million, sixty-five thousand, four hundred twenty-four".