78422305 has 8 divisors (see below), whose sum is σ = 101345832. Its totient is φ = 57911808.

The previous prime is 78422297. The next prime is 78422317. The reversal of 78422305 is 50322487.

It can be written as a sum of positive squares in 4 ways, for example, as 1140624 + 77281681 = 1068^2 + 8791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78422305 - 2³ = 78422297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603184 + ... + 603313.

It is an arithmetic number, because the mean of its divisors is an integer number (12668229).

Almost surely, 2^78422305 is an apocalyptic number.

It is an amenable number.

78422305 is a deficient number, since it is larger than the sum of its proper divisors (22923527).

78422305 is a wasteful number, since it uses less digits than its factorization.

78422305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206515.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 78422305 is about 8855.6369053841. The cubic root of 78422305 is about 428.0355769332.

The spelling of 78422305 in words is "seventy-eight million, four hundred twenty-two thousand, three hundred five".