256532378 has 8 divisors (see below), whose sum is σ = 397211520.
Its totient is φ = 124128540.
The previous prime is 256532377. The next prime is 256532383. The reversal of 256532378 is 873235652.
It can be divided in two parts, 2565 and 32378, that added together give a palindrome (34943).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (256532371) by changing a digit.
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 3 ways as a sum of consecutive naturals, for example, 2068748 + ... + 2068871.
It is an arithmetic number, because the mean of its divisors is an integer number (49651440).
Almost surely, 2256532378 is an apocalyptic number.
256532378 is a deficient number, since it is larger than the sum of its proper divisors (140679142).
256532378 is a wasteful number, since it uses less digits than its factorization.
256532378 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4137652.
The product of its digits is 302400, while the sum is 41.
The square root of 256532378 is about 16016.6281719968.
The cubic root of 256532378 is about 635.4002709181.
The spelling of 256532378 in words is "two hundred fifty-six million, five hundred thirty-two thousand, three hundred seventy-eight".