256154439 has 8 divisors (see below), whose sum is σ = 346349952. Its totient is φ = 168364280.

The previous prime is 256154413. The next prime is 256154461. The reversal of 256154439 is 934451652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256154439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256154397 and 256154406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256154539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601089 + ... + 601514.

It is an arithmetic number, because the mean of its divisors is an integer number (43293744).

Almost surely, 2^256154439 is an apocalyptic number.

256154439 is a deficient number, since it is larger than the sum of its proper divisors (90195513).

256154439 is a wasteful number, since it uses less digits than its factorization.

256154439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202677.

The product of its digits is 129600, while the sum is 39.

The square root of 256154439 is about 16004.8254910824. The cubic root of 256154439 is about 635.0880808646.

The spelling of 256154439 in words is "two hundred fifty-six million, one hundred fifty-four thousand, four hundred thirty-nine".