78839028 has 24 divisors (see below), whose sum is σ = 204397760. Its totient is φ = 26279640.

The previous prime is 78839027. The next prime is 78839071. The reversal of 78839028 is 82093887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78839021) 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, 364888 + ... + 365103.

Almost surely, 2^78839028 is an apocalyptic number.

It is an amenable number.

78839028 is an abundant number, since it is smaller than the sum of its proper divisors (125558732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78839028 is a wasteful number, since it uses less digits than its factorization.

78839028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730004 (or 729996 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 78839028 is about 8879.1344172729. The cubic root of 78839028 is about 428.7924077538.

The spelling of 78839028 in words is "seventy-eight million, eight hundred thirty-nine thousand, twenty-eight".