78396 has 24 divisors (see below), whose sum is σ = 188160. Its totient is φ = 25392.

The previous prime is 78367. The next prime is 78401. The reversal of 78396 is 69387.

It is a happy number.

It is a super-2 number, since 2×78396² = 12291865632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

78396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (7840).

2⁷⁸³⁹⁶ is an apocalyptic number.

It is an amenable number.

78396 is an abundant number, since it is smaller than the sum of its proper divisors (109764).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94080).

78396 is a wasteful number, since it uses less digits than its factorization.

78396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 191 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 78396 is about 279.9928570517. The cubic root of 78396 is about 42.7987713276.

Subtracting from 78396 its reverse (69387), we obtain a palindrome (9009).

It can be divided in two parts, 78 and 396, that added together give a palindrome (474).

The spelling of 78396 in words is "seventy-eight thousand, three hundred ninety-six".