256958298 has 64 divisors (see below), whose sum is σ = 607201920. Its totient is φ = 80269056.

The previous prime is 256958243. The next prime is 256958309. The reversal of 256958298 is 892859652.

256958298 is a `hidden beast` number, since 2 + 56 + 9 + 582 + 9 + 8 = 666.

It is a super-2 number, since 2×256958298² = 132055133822113608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290565 + ... + 291447.

It is an arithmetic number, because the mean of its divisors is an integer number (9487530).

Almost surely, 2^256958298 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256958298, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303600960).

256958298 is an abundant number, since it is smaller than the sum of its proper divisors (350243622).

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

256958298 is a wasteful number, since it uses less digits than its factorization.

256958298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1222 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 256958298 is about 16029.9188394701. The cubic root of 256958298 is about 635.7517275883.

The spelling of 256958298 in words is "two hundred fifty-six million, nine hundred fifty-eight thousand, two hundred ninety-eight".