78681528 has 48 divisors (see below), whose sum is σ = 222365520. Its totient is φ = 25086336.

The previous prime is 78681523. The next prime is 78681539. The reversal of 78681528 is 82518687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78681523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22101 + ... + 25412.

It is an arithmetic number, because the mean of its divisors is an integer number (4632615).

Almost surely, 2^78681528 is an apocalyptic number.

It is an amenable number.

78681528 is an abundant number, since it is smaller than the sum of its proper divisors (143683992).

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

78681528 is a wasteful number, since it uses less digits than its factorization.

78681528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47548 (or 47541 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 78681528 is about 8870.2608755324. The cubic root of 78681528 is about 428.5066785988.

The spelling of 78681528 in words is "seventy-eight million, six hundred eighty-one thousand, five hundred twenty-eight".