256622342 has 8 divisors (see below), whose sum is σ = 385014000. Its totient is φ = 128284344.

The previous prime is 256622291. The next prime is 256622347. The reversal of 256622342 is 243226652.

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

It is a super-3 number, since 3×256622342³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256622299 and 256622308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256622347) 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, 2159 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (48126750).

Almost surely, 2^256622342 is an apocalyptic number.

256622342 is a deficient number, since it is larger than the sum of its proper divisors (128391658).

256622342 is a wasteful number, since it uses less digits than its factorization.

256622342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26830.

The product of its digits is 34560, while the sum is 32.

The square root of 256622342 is about 16019.4363820953. The cubic root of 256622342 is about 635.4745389559.

Adding to 256622342 its reverse (243226652), we get a palindrome (499848994).

The spelling of 256622342 in words is "two hundred fifty-six million, six hundred twenty-two thousand, three hundred forty-two".