78935889 has 16 divisors (see below), whose sum is σ = 110960640. Its totient is φ = 49840080.

The previous prime is 78935881. The next prime is 78935893. The reversal of 78935889 is 98853987.

It is not a de Polignac number, because 78935889 - 2³ = 78935881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78935881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4659 + ... + 13400.

It is an arithmetic number, because the mean of its divisors is an integer number (6935040).

Almost surely, 2^78935889 is an apocalyptic number.

It is an amenable number.

78935889 is a deficient number, since it is larger than the sum of its proper divisors (32024751).

78935889 is a wasteful number, since it uses less digits than its factorization.

78935889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140.

The product of its digits is 4354560, while the sum is 57.

The square root of 78935889 is about 8884.5871597953. The cubic root of 78935889 is about 428.9679395301.

The spelling of 78935889 in words is "seventy-eight million, nine hundred thirty-five thousand, eight hundred eighty-nine".