68256305 has 32 divisors (see below), whose sum is σ = 91814688. Its totient is φ = 48384000.

The previous prime is 68256299. The next prime is 68256313. The reversal of 68256305 is 50365286.

It can be written as a sum of positive squares in 16 ways, for example, as 160801 + 68095504 = 401^2 + 8252^2 .

It is not a de Polignac number, because 68256305 - 2²⁶ = 1147441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242765 + ... + 243045.

It is an arithmetic number, because the mean of its divisors is an integer number (2869209).

Almost surely, 2^68256305 is an apocalyptic number.

68256305 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68256305 is a deficient number, since it is larger than the sum of its proper divisors (23558383).

68256305 is a wasteful number, since it uses less digits than its factorization.

68256305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 68256305 is about 8261.7374080759. The cubic root of 68256305 is about 408.6776851811.

The spelling of 68256305 in words is "sixty-eight million, two hundred fifty-six thousand, three hundred five".