78865235 has 4 divisors (see below), whose sum is σ = 94638288. Its totient is φ = 63092184.

The previous prime is 78865217. The next prime is 78865243. The reversal of 78865235 is 53256887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53256887 = 71 ⋅750097.

It is a cyclic number.

It is not a de Polignac number, because 78865235 - 2⁸ = 78864979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7886519 + ... + 7886528.

It is an arithmetic number, because the mean of its divisors is an integer number (23659572).

Almost surely, 2^78865235 is an apocalyptic number.

78865235 is a deficient number, since it is larger than the sum of its proper divisors (15773053).

78865235 is a wasteful number, since it uses less digits than its factorization.

78865235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15773052.

The product of its digits is 403200, while the sum is 44.

The square root of 78865235 is about 8880.6100578733. The cubic root of 78865235 is about 428.8399143336.

The spelling of 78865235 in words is "seventy-eight million, eight hundred sixty-five thousand, two hundred thirty-five".