256006730 has 16 divisors (see below), whose sum is σ = 526642560. Its totient is φ = 87773712.

The previous prime is 256006717. The next prime is 256006733. The reversal of 256006730 is 37600652.

It is a junction number, because it is equal to n+sod(n) for n = 256006693 and 256006702.

It is not an unprimeable number, because it can be changed into a prime (256006733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828550 + ... + 1828689.

It is an arithmetic number, because the mean of its divisors is an integer number (32915160).

Almost surely, 2^256006730 is an apocalyptic number.

256006730 is an abundant number, since it is smaller than the sum of its proper divisors (270635830).

256006730 is a wasteful number, since it uses less digits than its factorization.

256006730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657253.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 256006730 is about 16000.2103111178. The cubic root of 256006730 is about 634.9659849099.

The spelling of 256006730 in words is "two hundred fifty-six million, six thousand, seven hundred thirty".