78520880 has 40 divisors (see below), whose sum is σ = 184287312. Its totient is φ = 31111424.

The previous prime is 78520867. The next prime is 78520903. The reversal of 78520880 is 8802587.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3974 + ... + 13146.

Almost surely, 2^78520880 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 78520880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92143656).

78520880 is an abundant number, since it is smaller than the sum of its proper divisors (105766432).

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

78520880 is a wasteful number, since it uses less digits than its factorization.

78520880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9293 (or 9287 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 78520880 is about 8861.2008215591. The cubic root of 78520880 is about 428.2148454059.

The spelling of 78520880 in words is "seventy-eight million, five hundred twenty thousand, eight hundred eighty".