78057265 has 16 divisors (see below), whose sum is σ = 110045376. Its totient is φ = 52401600.

The previous prime is 78057233. The next prime is 78057269. The reversal of 78057265 is 56275087.

It is not a de Polignac number, because 78057265 - 2⁵ = 78057233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78057269) by changing a digit.

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, 53871 + ... + 55300.

It is an arithmetic number, because the mean of its divisors is an integer number (6877836).

Almost surely, 2^78057265 is an apocalyptic number.

It is an amenable number.

78057265 is a deficient number, since it is larger than the sum of its proper divisors (31988111).

78057265 is a wasteful number, since it uses less digits than its factorization.

78057265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109200.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 78057265 is about 8835.0022637235. The cubic root of 78057265 is about 427.3704040445.

Subtracting from 78057265 its sum of digits (40), we obtain a square (78057225 = 8835²).

The spelling of 78057265 in words is "seventy-eight million, fifty-seven thousand, two hundred sixty-five".