256678029 has 12 divisors (see below), whose sum is σ = 370909500. Its totient is φ = 171048384.

The previous prime is 256678021. The next prime is 256678033. The reversal of 256678029 is 920876652.

256678029 is a `hidden beast` number, since 2 + 566 + 7 + 80 + 2 + 9 = 666.

256678029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 101002500 + 155675529 = 10050^2 + 12477^2 .

It is not a de Polignac number, because 256678029 - 2³ = 256678021 is a prime.

It is a super-2 number, since 2×256678029² = 131767221142649682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256678021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26907 + ... + 35175.

It is an arithmetic number, because the mean of its divisors is an integer number (30909125).

Almost surely, 2^256678029 is an apocalyptic number.

It is an amenable number.

256678029 is a deficient number, since it is larger than the sum of its proper divisors (114231471).

256678029 is a wasteful number, since it uses less digits than its factorization.

256678029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724 (or 11721 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 256678029 is about 16021.1743951559. The cubic root of 256678029 is about 635.5205015833.

The spelling of 256678029 in words is "two hundred fifty-six million, six hundred seventy-eight thousand, twenty-nine".