78068440 has 32 divisors (see below), whose sum is σ = 183293280. Its totient is φ = 29869312.

The previous prime is 78068429. The next prime is 78068443. The reversal of 78068440 is 4486087.

It is a self number, because there is not a number n which added to its sum of digits gives 78068440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78068443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41509 + ... + 43348.

It is an arithmetic number, because the mean of its divisors is an integer number (5727915).

Almost surely, 2^78068440 is an apocalyptic number.

It is an amenable number.

78068440 is an abundant number, since it is smaller than the sum of its proper divisors (105224840).

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

78068440 is a wasteful number, since it uses less digits than its factorization.

78068440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84891 (or 84887 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 78068440 is about 8835.6346687717. The cubic root of 78068440 is about 427.3907977745.

The spelling of 78068440 in words is "seventy-eight million, sixty-eight thousand, four hundred forty".