78559280 has 80 divisors (see below), whose sum is σ = 191800224. Its totient is φ = 29890560.

The previous prime is 78559253. The next prime is 78559291. The reversal of 78559280 is 8295587.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140762 + ... + 141318.

Almost surely, 2^78559280 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 78559280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95900112).

78559280 is an abundant number, since it is smaller than the sum of its proper divisors (113240944).

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

78559280 is a wasteful number, since it uses less digits than its factorization.

78559280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 78559280 is about 8863.3673059397. The cubic root of 78559280 is about 428.2846390297.

The spelling of 78559280 in words is "seventy-eight million, five hundred fifty-nine thousand, two hundred eighty".