256187536 has 40 divisors (see below), whose sum is σ = 544393728. Its totient is φ = 115824000.

The previous prime is 256187527. The next prime is 256187563. The reversal of 256187536 is 635781652.

It is a junction number, because it is equal to n+sod(n) for n = 256187492 and 256187501.

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, 29806 + ... + 37426.

Almost surely, 2^256187536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256187536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272196864).

256187536 is an abundant number, since it is smaller than the sum of its proper divisors (288206192).

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

256187536 is a wasteful number, since it uses less digits than its factorization.

256187536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831 (or 7825 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 256187536 is about 16005.8594270973. The cubic root of 256187536 is about 635.1154323393.

The spelling of 256187536 in words is "two hundred fifty-six million, one hundred eighty-seven thousand, five hundred thirty-six".