256346534 has 8 divisors (see below), whose sum is σ = 388113768. Its totient is φ = 126975280.

The previous prime is 256346491. The next prime is 256346539. The reversal of 256346534 is 435643652.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256346539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598727 + ... + 599154.

It is an arithmetic number, because the mean of its divisors is an integer number (48514221).

Almost surely, 2^256346534 is an apocalyptic number.

256346534 is a deficient number, since it is larger than the sum of its proper divisors (131767234).

256346534 is a wasteful number, since it uses less digits than its factorization.

256346534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197990.

The product of its digits is 259200, while the sum is 38.

The square root of 256346534 is about 16010.8255252501. The cubic root of 256346534 is about 635.2467960028.

The spelling of 256346534 in words is "two hundred fifty-six million, three hundred forty-six thousand, five hundred thirty-four".