78506235 has 12 divisors (see below), whose sum is σ = 136077552. Its totient is φ = 41869968.

The previous prime is 78506231. The next prime is 78506237. The reversal of 78506235 is 53260587.

It is not a de Polignac number, because 78506235 - 2² = 78506231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78506235.

It is not an unprimeable number, because it can be changed into a prime (78506231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872247 + ... + 872336.

It is an arithmetic number, because the mean of its divisors is an integer number (11339796).

Almost surely, 2^78506235 is an apocalyptic number.

78506235 is a deficient number, since it is larger than the sum of its proper divisors (57571317).

78506235 is a wasteful number, since it uses less digits than its factorization.

78506235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744594 (or 1744591 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 78506235 is about 8860.3744277542. The cubic root of 78506235 is about 428.1882215052.

The spelling of 78506235 in words is "seventy-eight million, five hundred six thousand, two hundred thirty-five".