259439490 has 128 divisors (see below), whose sum is σ = 736819200. Its totient is φ = 64774080.

The previous prime is 259439489. The next prime is 259439497. The reversal of 259439490 is 94934952.

It is a happy number.

259439490 is a `hidden beast` number, since 259 + 4 + 394 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (259439497) 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 63 ways as a sum of consecutive naturals, for example, 528145 + ... + 528635.

It is an arithmetic number, because the mean of its divisors is an integer number (5756400).

Almost surely, 2^259439490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 259439490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368409600).

259439490 is an abundant number, since it is smaller than the sum of its proper divisors (477379710).

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

259439490 is a wasteful number, since it uses less digits than its factorization.

259439490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 259439490 is about 16107.1254418658. The cubic root of 259439490 is about 637.7914515093.

The spelling of 259439490 in words is "two hundred fifty-nine million, four hundred thirty-nine thousand, four hundred ninety".