256045330 has 48 divisors (see below), whose sum is σ = 515465280. Its totient is φ = 91300608.

The previous prime is 256045327. The next prime is 256045333. The reversal of 256045330 is 33540652.

It is an interprime number because it is at equal distance from previous prime (256045327) and next prime (256045333).

It is a super-2 number, since 2×256045330² = 131118422029617800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256045333) 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 23 ways as a sum of consecutive naturals, for example, 52579 + ... + 57241.

It is an arithmetic number, because the mean of its divisors is an integer number (10738860).

Almost surely, 2^256045330 is an apocalyptic number.

256045330 is an abundant number, since it is smaller than the sum of its proper divisors (259419950).

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

256045330 is a wasteful number, since it uses less digits than its factorization.

256045330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723 (or 4706 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 256045330 is about 16001.4164997978. The cubic root of 256045330 is about 634.9978961222.

Adding to 256045330 its reverse (33540652), we get a palindrome (289585982).

The spelling of 256045330 in words is "two hundred fifty-six million, forty-five thousand, three hundred thirty".