78905266 has 16 divisors (see below), whose sum is σ = 129286080. Its totient is φ = 35819280.

The previous prime is 78905263. The next prime is 78905273. The reversal of 78905266 is 66250987.

It is not an unprimeable number, because it can be changed into a prime (78905263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19420 + ... + 23128.

It is an arithmetic number, because the mean of its divisors is an integer number (8080380).

Almost surely, 2^78905266 is an apocalyptic number.

78905266 is a deficient number, since it is larger than the sum of its proper divisors (50380814).

78905266 is a wasteful number, since it uses less digits than its factorization.

78905266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 78905266 is about 8882.8636148485. The cubic root of 78905266 is about 428.9124599737.

The spelling of 78905266 in words is "seventy-eight million, nine hundred five thousand, two hundred sixty-six".