256144650 has 24 divisors (see below), whose sum is σ = 635239104. Its totient is φ = 68305200.

The previous prime is 256144639. The next prime is 256144657. The reversal of 256144650 is 56441652.

It is a super-2 number, since 2×256144650² = 131220163447245000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256144657) 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 11 ways as a sum of consecutive naturals, for example, 853666 + ... + 853965.

It is an arithmetic number, because the mean of its divisors is an integer number (26468296).

Almost surely, 2^256144650 is an apocalyptic number.

256144650 is an abundant number, since it is smaller than the sum of its proper divisors (379094454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256144650 is a wasteful number, since it uses less digits than its factorization.

256144650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707646 (or 1707641 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 256144650 is about 16004.5196741421. The cubic root of 256144650 is about 635.0799907498.

The spelling of 256144650 in words is "two hundred fifty-six million, one hundred forty-four thousand, six hundred fifty".