256357342 has 4 divisors (see below), whose sum is σ = 384536016. Its totient is φ = 128178670.

The previous prime is 256357327. The next prime is 256357363. The reversal of 256357342 is 243753652.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×256357342³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64089334 + ... + 64089337.

It is an arithmetic number, because the mean of its divisors is an integer number (96134004).

Almost surely, 2^256357342 is an apocalyptic number.

256357342 is a deficient number, since it is larger than the sum of its proper divisors (128178674).

256357342 is a wasteful number, since it uses less digits than its factorization.

256357342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128178673.

The product of its digits is 151200, while the sum is 37.

The square root of 256357342 is about 16011.1630433270. The cubic root of 256357342 is about 635.2557235676.

The spelling of 256357342 in words is "two hundred fifty-six million, three hundred fifty-seven thousand, three hundred forty-two".