256929730 has 32 divisors (see below), whose sum is σ = 483335424. Its totient is φ = 98238336.

The previous prime is 256929713. The next prime is 256929733. The reversal of 256929730 is 37929652.

256929730 = T₁₉₃₁ + T₁₉₃₂ + ... + T₂₀₅₉.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (256929733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13854 + ... + 26566.

It is an arithmetic number, because the mean of its divisors is an integer number (15104232).

Almost surely, 2^256929730 is an apocalyptic number.

256929730 is a deficient number, since it is larger than the sum of its proper divisors (226405694).

256929730 is a wasteful number, since it uses less digits than its factorization.

256929730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12810.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 256929730 is about 16029.0277309636. The cubic root of 256929730 is about 635.7281662704.

The spelling of 256929730 in words is "two hundred fifty-six million, nine hundred twenty-nine thousand, seven hundred thirty".