78528712 has 32 divisors (see below), whose sum is σ = 157473720. Its totient is φ = 36582400.

The previous prime is 78528677. The next prime is 78528713. The reversal of 78528712 is 21782587.

It can be written as a sum of positive squares in 4 ways, for example, as 77898276 + 630436 = 8826^2 + 794^2 .

It is not an unprimeable number, because it can be changed into a prime (78528713) 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, 10878 + ... + 16594.

Almost surely, 2^78528712 is an apocalyptic number.

It is an amenable number.

78528712 is an abundant number, since it is smaller than the sum of its proper divisors (78945008).

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

78528712 is a wasteful number, since it uses less digits than its factorization.

78528712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841 (or 5837 counting only the distinct ones).

The product of its digits is 62720, while the sum is 40.

The square root of 78528712 is about 8861.6427371002. The cubic root of 78528712 is about 428.2290822440.

The spelling of 78528712 in words is "seventy-eight million, five hundred twenty-eight thousand, seven hundred twelve".