78713280 has 168 divisors, whose sum is σ = 274039584. Its totient is φ = 20736000.

The previous prime is 78713237. The next prime is 78713293. The reversal of 78713280 is 8231787.

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

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, 434790 + ... + 434970.

It is an arithmetic number, because the mean of its divisors is an integer number (1631188).

Almost surely, 2^78713280 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 78713280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137019792).

78713280 is an abundant number, since it is smaller than the sum of its proper divisors (195326304).

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

78713280 is a wasteful number, since it uses less digits than its factorization.

78713280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 78713280 is about 8872.0504957986. The cubic root of 78713280 is about 428.5643122628.

The spelling of 78713280 in words is "seventy-eight million, seven hundred thirteen thousand, two hundred eighty".