259401366 has 160 divisors (see below), whose sum is σ = 704765952. Its totient is φ = 69750720.

The previous prime is 259401349. The next prime is 259401379. The reversal of 259401366 is 663104952.

It is a happy number.

259401366 is a `hidden beast` number, since 2 + 594 + 0 + 1 + 3 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 259401366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1652160 + ... + 1652316.

Almost surely, 2^259401366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 259401366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352382976).

259401366 is an abundant number, since it is smaller than the sum of its proper divisors (445364586).

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

259401366 is a wasteful number, since it uses less digits than its factorization.

259401366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 259401366 is about 16105.9419469958. The cubic root of 259401366 is about 637.7602093464.

The spelling of 259401366 in words is "two hundred fifty-nine million, four hundred one thousand, three hundred sixty-six".