78728597 has 8 divisors (see below), whose sum is σ = 80426400. Its totient is φ = 77043024.

The previous prime is 78728593. The next prime is 78728621. The reversal of 78728597 is 79582787.

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 78728597 - 2² = 78728593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10598 + ... + 16424.

It is an arithmetic number, because the mean of its divisors is an integer number (10053300).

Almost surely, 2^78728597 is an apocalyptic number.

It is an amenable number.

78728597 is a deficient number, since it is larger than the sum of its proper divisors (1697803).

78728597 is a wasteful number, since it uses less digits than its factorization.

78728597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115.

The product of its digits is 1975680, while the sum is 53.

The square root of 78728597 is about 8872.9136702664. The cubic root of 78728597 is about 428.5921089015.

The spelling of 78728597 in words is "seventy-eight million, seven hundred twenty-eight thousand, five hundred ninety-seven".