256265736 has 16 divisors (see below), whose sum is σ = 640664400. Its totient is φ = 85421904.

The previous prime is 256265717. The next prime is 256265741. The reversal of 256265736 is 637562652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5338846 + ... + 5338893.

It is an arithmetic number, because the mean of its divisors is an integer number (40041525).

Almost surely, 2^256265736 is an apocalyptic number.

It is an amenable number.

256265736 is an abundant number, since it is smaller than the sum of its proper divisors (384398664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256265736 is a wasteful number, since it uses less digits than its factorization.

256265736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677748 (or 10677744 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 256265736 is about 16008.3020961000. The cubic root of 256265736 is about 635.1800477314.

The spelling of 256265736 in words is "two hundred fifty-six million, two hundred sixty-five thousand, seven hundred thirty-six".