256336158 has 48 divisors (see below), whose sum is σ = 568149120. Its totient is φ = 77025312.

The previous prime is 256336147. The next prime is 256336159. The reversal of 256336158 is 851633652.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256336159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40663 + ... + 46541.

It is an arithmetic number, because the mean of its divisors is an integer number (11836440).

Almost surely, 2^256336158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256336158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284074560).

256336158 is an abundant number, since it is smaller than the sum of its proper divisors (311812962).

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

256336158 is a wasteful number, since it uses less digits than its factorization.

256336158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5953 (or 5940 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 256336158 is about 16010.5014912088. The cubic root of 256336158 is about 635.2382250402.

The spelling of 256336158 in words is "two hundred fifty-six million, three hundred thirty-six thousand, one hundred fifty-eight".