78538080 has 48 divisors (see below), whose sum is σ = 247396464. Its totient is φ = 20943360.

The previous prime is 78538063. The next prime is 78538091. The reversal of 78538080 is 8083587.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 81331 + ... + 82290.

It is an arithmetic number, because the mean of its divisors is an integer number (5154093).

Almost surely, 2^78538080 is an apocalyptic number.

It is an amenable number.

78538080 is an abundant number, since it is smaller than the sum of its proper divisors (168858384).

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

78538080 is a wasteful number, since it uses less digits than its factorization.

78538080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163639 (or 163631 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 78538080 is about 8862.1712915064. The cubic root of 78538080 is about 428.2461099461.

The spelling of 78538080 in words is "seventy-eight million, five hundred thirty-eight thousand, eighty".