78528577 has 8 divisors (see below), whose sum is σ = 83160000. Its totient is φ = 73947024.

The previous prime is 78528551. The next prime is 78528589. The reversal of 78528577 is 77582587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78528577 - 2²³ = 70139969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78528577.

It is not an unprimeable number, because it can be changed into a prime (78528517) 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, 9202 + ... + 15547.

It is an arithmetic number, because the mean of its divisors is an integer number (10395000).

Almost surely, 2^78528577 is an apocalyptic number.

It is an amenable number.

78528577 is a deficient number, since it is larger than the sum of its proper divisors (4631423).

78528577 is a wasteful number, since it uses less digits than its factorization.

78528577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24935.

The product of its digits is 1097600, while the sum is 49.

The square root of 78528577 is about 8861.6351199990. The cubic root of 78528577 is about 428.2288368520.

The spelling of 78528577 in words is "seventy-eight million, five hundred twenty-eight thousand, five hundred seventy-seven".