78560 has 24 divisors (see below), whose sum is σ = 185976. Its totient is φ = 31360.

The previous prime is 78553. The next prime is 78569. The reversal of 78560 is 6587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78569) by changing a digit.

78560 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (7749).

2⁷⁸⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

78560 is an abundant number, since it is smaller than the sum of its proper divisors (107416).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92988).

78560 is a wasteful number, since it uses less digits than its factorization.

78560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 78560 is about 280.2855686617. The cubic root of 78560 is about 42.8285947443.

The spelling of 78560 in words is "seventy-eight thousand, five hundred sixty".