256078829 has 4 divisors (see below), whose sum is σ = 256245276. Its totient is φ = 255912384.

The previous prime is 256078807. The next prime is 256078841. The reversal of 256078829 is 928870652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55204900 + 200873929 = 7430^2 + 14173^2 .

It is a cyclic number.

It is not a de Polignac number, because 256078829 - 2¹² = 256074733 is a prime.

It is a super-2 number, since 2×256078829² = 131152733324022482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256074829) 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, 80894 + ... + 83999.

It is an arithmetic number, because the mean of its divisors is an integer number (64061319).

Almost surely, 2^256078829 is an apocalyptic number.

It is an amenable number.

256078829 is a deficient number, since it is larger than the sum of its proper divisors (166447).

256078829 is a wasteful number, since it uses less digits than its factorization.

256078829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166446.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 256078829 is about 16002.4632166426. The cubic root of 256078829 is about 635.0255876601.

The spelling of 256078829 in words is "two hundred fifty-six million, seventy-eight thousand, eight hundred twenty-nine".