256836448 has 24 divisors (see below), whose sum is σ = 551615400. Its totient is φ = 116743680.

The previous prime is 256836439. The next prime is 256836449. The reversal of 256836448 is 844638652.

It is a super-2 number, since 2×256836448² = 131929922042513408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256836398 and 256836407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256836449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364473 + ... + 365176.

It is an arithmetic number, because the mean of its divisors is an integer number (22983975).

Almost surely, 2^256836448 is an apocalyptic number.

It is an amenable number.

256836448 is an abundant number, since it is smaller than the sum of its proper divisors (294778952).

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

256836448 is a wasteful number, since it uses less digits than its factorization.

256836448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729670 (or 729662 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 46.

The square root of 256836448 is about 16026.1176833318. The cubic root of 256836448 is about 635.6512202340.

It can be divided in two parts, 25683 and 6448, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 256836448 in words is "two hundred fifty-six million, eight hundred thirty-six thousand, four hundred forty-eight".