256598487 has 12 divisors (see below), whose sum is σ = 370943664. Its totient is φ = 170926560.

The previous prime is 256598483. The next prime is 256598491. The reversal of 256598487 is 784895652.

256598487 is a `hidden beast` number, since 2 + 5 + 6 + 598 + 48 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (256598483) and next prime (256598491).

It is not a de Polignac number, because 256598487 - 2² = 256598483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256598483) 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 11 ways as a sum of consecutive naturals, for example, 787 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (30911972).

Almost surely, 2^256598487 is an apocalyptic number.

256598487 is a deficient number, since it is larger than the sum of its proper divisors (114345177).

256598487 is a wasteful number, since it uses less digits than its factorization.

256598487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23190 (or 23187 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 256598487 is about 16018.6918005185. The cubic root of 256598487 is about 635.4548476139.

The spelling of 256598487 in words is "two hundred fifty-six million, five hundred ninety-eight thousand, four hundred eighty-seven".