259744660 has 96 divisors (see below), whose sum is σ = 651184128. Its totient is φ = 85155840.

The previous prime is 259744643. The next prime is 259744663. The reversal of 259744660 is 66447952.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259744663) 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 31 ways as a sum of consecutive naturals, for example, 420672 + ... + 421288.

It is an arithmetic number, because the mean of its divisors is an integer number (6783168).

Almost surely, 2^259744660 is an apocalyptic number.

259744660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 259744660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325592064).

259744660 is an abundant number, since it is smaller than the sum of its proper divisors (391439468).

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

259744660 is a wasteful number, since it uses less digits than its factorization.

259744660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 259744660 is about 16116.5957943978. The cubic root of 259744660 is about 638.0414244451.

The spelling of 259744660 in words is "two hundred fifty-nine million, seven hundred forty-four thousand, six hundred sixty".