78860560 has 40 divisors (see below), whose sum is σ = 191327040. Its totient is φ = 30172032.

The previous prime is 78860557. The next prime is 78860567. The reversal of 78860560 is 6506887.

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

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (78860567) 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, 19590 + ... + 23269.

It is an arithmetic number, because the mean of its divisors is an integer number (4783176).

Almost surely, 2^78860560 is an apocalyptic number.

It is an amenable number.

78860560 is an abundant number, since it is smaller than the sum of its proper divisors (112466480).

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

78860560 is a wasteful number, since it uses less digits than its factorization.

78860560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42895 (or 42889 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 78860560 is about 8880.3468400733. The cubic root of 78860560 is about 428.8314405271.

The spelling of 78860560 in words is "seventy-eight million, eight hundred sixty thousand, five hundred sixty".