78508 has 12 divisors (see below), whose sum is σ = 144760. Its totient is φ = 37152.

The previous prime is 78497. The next prime is 78509. The reversal of 78508 is 80587.

It is not an unprimeable number, because it can be changed into a prime (78509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441 + ... + 592.

2⁷⁸⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

78508 is a deficient number, since it is larger than the sum of its proper divisors (66252).

78508 is a wasteful number, since it uses less digits than its factorization.

78508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 78508 is about 280.1927907709. The cubic root of 78508 is about 42.8191430365.

It can be divided in two parts, 7 and 8508, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 78508 in words is "seventy-eight thousand, five hundred eight".