78828593 has 4 divisors (see below), whose sum is σ = 79312368. Its totient is φ = 78344820.

The previous prime is 78828559. The next prime is 78828619. The reversal of 78828593 is 39582887.

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: 39582887 = 97 ⋅408071.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78828593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78828523) 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, 241643 + ... + 241968.

It is an arithmetic number, because the mean of its divisors is an integer number (19828092).

Almost surely, 2^78828593 is an apocalyptic number.

It is an amenable number.

78828593 is a deficient number, since it is larger than the sum of its proper divisors (483775).

78828593 is a wasteful number, since it uses less digits than its factorization.

78828593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483774.

The product of its digits is 967680, while the sum is 50.

The square root of 78828593 is about 8878.5467842435. The cubic root of 78828593 is about 428.7734888406.

The spelling of 78828593 in words is "seventy-eight million, eight hundred twenty-eight thousand, five hundred ninety-three".