78226265 has 16 divisors (see below), whose sum is σ = 107040528. Its totient is φ = 54368256.

The previous prime is 78226241. The next prime is 78226273. The reversal of 78226265 is 56262287.

It can be written as a sum of positive squares in 8 ways, for example, as 13520329 + 64705936 = 3677^2 + 8044^2 .

It is a cyclic number.

It is not a de Polignac number, because 78226265 - 2⁶ = 78226201 is a prime.

It is a super-2 number, since 2×78226265² = 12238697071700450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34292 + ... + 36501.

It is an arithmetic number, because the mean of its divisors is an integer number (6690033).

Almost surely, 2^78226265 is an apocalyptic number.

It is an amenable number.

78226265 is a deficient number, since it is larger than the sum of its proper divisors (28814263).

78226265 is a wasteful number, since it uses less digits than its factorization.

78226265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70828.

The product of its digits is 80640, while the sum is 38.

The square root of 78226265 is about 8844.5613232087. The cubic root of 78226265 is about 427.6786116842.

The spelling of 78226265 in words is "seventy-eight million, two hundred twenty-six thousand, two hundred sixty-five".