78928 has 10 divisors (see below), whose sum is σ = 152954. Its totient is φ = 39456.

The previous prime is 78919. The next prime is 78929. The reversal of 78928 is 82987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61504 + 17424 = 248^2 + 132^2 .

It is a d-powerful number, because it can be written as 7⁵ + 8³ + 9⁵ + 2¹¹ + 8³ .

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 78893 and 78902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2451 + ... + 2482.

2⁷⁸⁹²⁸ is an apocalyptic number.

It is an amenable number.

78928 is a deficient number, since it is larger than the sum of its proper divisors (74026).

78928 is a wasteful number, since it uses less digits than its factorization.

78928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941 (or 4935 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 78928 is about 280.9412750024. The cubic root of 78928 is about 42.8953648435.

It can be divided in two parts, 7892 and 8, that multiplied together give a palindrome (63136).

The spelling of 78928 in words is "seventy-eight thousand, nine hundred twenty-eight".