78520560 has 80 divisors (see below), whose sum is σ = 248046624. Its totient is φ = 20540416.

The previous prime is 78520553. The next prime is 78520571. The reversal of 78520560 is 6502587.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 9634 + ... + 15806.

Almost surely, 2^78520560 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 78520560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124023312).

78520560 is an abundant number, since it is smaller than the sum of its proper divisors (169526064).

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

78520560 is a wasteful number, since it uses less digits than its factorization.

78520560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242 (or 6236 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 78520560 is about 8861.1827652972. The cubic root of 78520560 is about 428.2142636968.

The spelling of 78520560 in words is "seventy-eight million, five hundred twenty thousand, five hundred sixty".