78485520 has 40 divisors (see below), whose sum is σ = 243305856. Its totient is φ = 20929408.

The previous prime is 78485507. The next prime is 78485543. The reversal of 78485520 is 2558487.

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, 163272 + ... + 163751.

Almost surely, 2^78485520 is an apocalyptic number.

It is an amenable number.

78485520 is an abundant number, since it is smaller than the sum of its proper divisors (164820336).

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

78485520 is a wasteful number, since it uses less digits than its factorization.

78485520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327039 (or 327033 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 78485520 is about 8859.2053819742. The cubic root of 78485520 is about 428.1505569839.

The spelling of 78485520 in words is "seventy-eight million, four hundred eighty-five thousand, five hundred twenty".