78550560 has 480 divisors, whose sum is σ = 329313600. Its totient is φ = 17418240.

The previous prime is 78550553. The next prime is 78550597. The reversal of 78550560 is 6505587.

It is a tau number, because it is divible by the number of its divisors (480).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2708626 + ... + 2708654.

It is an arithmetic number, because the mean of its divisors is an integer number (686070).

Almost surely, 2^78550560 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 78550560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164656800).

78550560 is an abundant number, since it is smaller than the sum of its proper divisors (250763040).

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

78550560 is a wasteful number, since it uses less digits than its factorization.

78550560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 78550560 is about 8862.8753799204. The cubic root of 78550560 is about 428.2687920572.

The spelling of 78550560 in words is "seventy-eight million, five hundred fifty thousand, five hundred sixty".