78848557 has 4 divisors (see below), whose sum is σ = 79846720. Its totient is φ = 77850396.

The previous prime is 78848543. The next prime is 78848573. The reversal of 78848557 is 75584887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75584887 = 7 ⋅10797841.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78848557 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 (78848587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498963 + ... + 499120.

It is an arithmetic number, because the mean of its divisors is an integer number (19961680).

Almost surely, 2^78848557 is an apocalyptic number.

It is an amenable number.

78848557 is a deficient number, since it is larger than the sum of its proper divisors (998163).

78848557 is an equidigital number, since it uses as much as digits as its factorization.

78848557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998162.

The product of its digits is 2508800, while the sum is 52.

The square root of 78848557 is about 8879.6709961575. The cubic root of 78848557 is about 428.8096826085.

The spelling of 78848557 in words is "seventy-eight million, eight hundred forty-eight thousand, five hundred fifty-seven".