256532538 has 8 divisors (see below), whose sum is σ = 513065088. Its totient is φ = 85510844.

The previous prime is 256532537. The next prime is 256532543. The reversal of 256532538 is 835235652.

It is a sphenic number, since it is the product of 3 distinct primes.

256532538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 256532496 and 256532505.

It is not an unprimeable number, because it can be changed into a prime (256532537) 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, 21377706 + ... + 21377717.

It is an arithmetic number, because the mean of its divisors is an integer number (64133136).

Almost surely, 2^256532538 is an apocalyptic number.

256532538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256532538 is a wasteful number, since it uses less digits than its factorization.

256532538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42755428.

The product of its digits is 216000, while the sum is 39.

The square root of 256532538 is about 16016.6331668051. The cubic root of 256532538 is about 635.4004030184.

The spelling of 256532538 in words is "two hundred fifty-six million, five hundred thirty-two thousand, five hundred thirty-eight".