259135640 has 32 divisors (see below), whose sum is σ = 588725280. Its totient is φ = 102646272.

The previous prime is 259135633. The next prime is 259135691. The reversal of 259135640 is 46531952.

It is a self number, because there is not a number n which added to its sum of digits gives 259135640.

It is a congruent number.

It is an unprimeable number.

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, 27329 + ... + 35568.

It is an arithmetic number, because the mean of its divisors is an integer number (18397665).

Almost surely, 2^259135640 is an apocalyptic number.

259135640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

259135640 is an abundant number, since it is smaller than the sum of its proper divisors (329589640).

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

259135640 is a wasteful number, since it uses less digits than its factorization.

259135640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63011 (or 63007 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 259135640 is about 16097.6905175867. The cubic root of 259135640 is about 637.5423649918.

The spelling of 259135640 in words is "two hundred fifty-nine million, one hundred thirty-five thousand, six hundred forty".