256749010 has 32 divisors (see below), whose sum is σ = 529079040. Its totient is φ = 87876672.

The previous prime is 256749007. The next prime is 256749019. The reversal of 256749010 is 10947652.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256749019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42456 + ... + 48124.

It is an arithmetic number, because the mean of its divisors is an integer number (16533720).

Almost surely, 2^256749010 is an apocalyptic number.

256749010 is an abundant number, since it is smaller than the sum of its proper divisors (272330030).

256749010 is a wasteful number, since it uses less digits than its factorization.

256749010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6330.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 256749010 is about 16023.3894666516. The cubic root of 256749010 is about 635.5790778515.

The spelling of 256749010 in words is "two hundred fifty-six million, seven hundred forty-nine thousand, ten".