78328 has 8 divisors (see below), whose sum is σ = 146880. Its totient is φ = 39160.
The previous prime is 78317. The next prime is 78341. The reversal of 78328 is 82387.
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (8).
It is a super-2 number, since 2×783282 = 12270551168, which contains 22 as substring.
It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.
It is a junction number, because it is equal to n+sod(n) for n = 78296 and 78305.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4888 + ... + 4903.
It is an arithmetic number, because the mean of its divisors is an integer number (18360).
278328 is an apocalyptic number.
It is an amenable number.
78328 is a deficient number, since it is larger than the sum of its proper divisors (68552).
78328 is a wasteful number, since it uses less digits than its factorization.
78328 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9797 (or 9793 counting only the distinct ones).
The product of its digits is 2688, while the sum is 28.
The square root of 78328 is about 279.8713990389. The cubic root of 78328 is about 42.7863933223.
It can be divided in two parts, 78 and 328, that added together give a triangular number (406 = T28).
The spelling of 78328 in words is "seventy-eight thousand, three hundred twenty-eight".
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