78380 has 12 divisors (see below), whose sum is σ = 164640. Its totient is φ = 31344.

The previous prime is 78367. The next prime is 78401. The reversal of 78380 is 8387.

It is a super-2 number, since 2×78380² = 12286848800, which contains 22 as substring.

It is an unprimeable number.

78380 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (13720).

2⁷⁸³⁸⁰ is an apocalyptic number.

It is an amenable number.

78380 is an abundant number, since it is smaller than the sum of its proper divisors (86260).

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 (82320).

78380 is a wasteful number, since it uses less digits than its factorization.

78380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78380 is about 279.9642834363. The cubic root of 78380 is about 42.7958594999.

The spelling of 78380 in words is "seventy-eight thousand, three hundred eighty".