78308 has 6 divisors (see below), whose sum is σ = 137046. Its totient is φ = 39152.

The previous prime is 78307. The next prime is 78311. The reversal of 78308 is 80387.

It can be written as a sum of positive squares in only one way, i.e., 77284 + 1024 = 278^2 + 32^2 .

It is a super-2 number, since 2×78308² = 12264285728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9785 + ... + 9792.

It is an arithmetic number, because the mean of its divisors is an integer number (22841).

2⁷⁸³⁰⁸ is an apocalyptic number.

It is an amenable number.

78308 is a deficient number, since it is larger than the sum of its proper divisors (58738).

78308 is a wasteful number, since it uses less digits than its factorization.

78308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19581 (or 19579 counting only the distinct ones).

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

The square root of 78308 is about 279.8356660614. The cubic root of 78308 is about 42.7827513691.

The spelling of 78308 in words is "seventy-eight thousand, three hundred eight".