78068720 has 40 divisors (see below), whose sum is σ = 191066640. Its totient is φ = 29583360.

The previous prime is 78068717. The next prime is 78068729. The reversal of 78068720 is 2786087.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78068729) 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, 24161 + ... + 27200.

It is an arithmetic number, because the mean of its divisors is an integer number (4776666).

Almost surely, 2^78068720 is an apocalyptic number.

It is an amenable number.

78068720 is an abundant number, since it is smaller than the sum of its proper divisors (112997920).

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

78068720 is a wasteful number, since it uses less digits than its factorization.

78068720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51393 (or 51387 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 78068720 is about 8835.6505136860. The cubic root of 78068720 is about 427.3913087333.

The spelling of 78068720 in words is "seventy-eight million, sixty-eight thousand, seven hundred twenty".