256134340 has 96 divisors (see below), whose sum is σ = 682214400. Its totient is φ = 78453120.

The previous prime is 256134331. The next prime is 256134343. The reversal of 256134340 is 43431652.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a cake number, because a cake can be divided into 256134340 parts by 1154 planar cuts.

It is a junction number, because it is equal to n+sod(n) for n = 256134299 and 256134308.

It is not an unprimeable number, because it can be changed into a prime (256134343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89451 + ... + 92269.

It is an arithmetic number, because the mean of its divisors is an integer number (7106400).

Almost surely, 2^256134340 is an apocalyptic number.

256134340 is a gapful number since it is divisible by the number (20) 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 256134340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341107200).

256134340 is an abundant number, since it is smaller than the sum of its proper divisors (426080060).

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

256134340 is a wasteful number, since it uses less digits than its factorization.

256134340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 256134340 is about 16004.1975743865. The cubic root of 256134340 is about 635.0714698320.

Adding to 256134340 its reverse (43431652), we get a palindrome (299565992).

The spelling of 256134340 in words is "two hundred fifty-six million, one hundred thirty-four thousand, three hundred forty".