256028136 has 96 divisors (see below), whose sum is σ = 801894240. Its totient is φ = 67519872.

The previous prime is 256028093. The next prime is 256028159. The reversal of 256028136 is 631820652.

It is a junction number, because it is equal to n+sod(n) for n = 256028097 and 256028106.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6915 + ... + 23661.

It is an arithmetic number, because the mean of its divisors is an integer number (8353065).

Almost surely, 2^256028136 is an apocalyptic number.

256028136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256028136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400947120).

256028136 is an abundant number, since it is smaller than the sum of its proper divisors (545866104).

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

256028136 is a wasteful number, since it uses less digits than its factorization.

256028136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16783 (or 16772 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 256028136 is about 16000.8792258426. The cubic root of 256028136 is about 634.9836819747.

Adding to 256028136 its reverse (631820652), we get a palindrome (887848788).

The spelling of 256028136 in words is "two hundred fifty-six million, twenty-eight thousand, one hundred thirty-six".