259844820 has 48 divisors (see below), whose sum is σ = 732056640. Its totient is φ = 68866848.

The previous prime is 259844807. The next prime is 259844833. The reversal of 259844820 is 28448952.

It is an interprime number because it is at equal distance from previous prime (259844807) and next prime (259844833).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 815 × 489 × 652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1594059 + ... + 1594221.

It is an arithmetic number, because the mean of its divisors is an integer number (15251180).

Almost surely, 2^259844820 is an apocalyptic number.

259844820 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 259844820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366028320).

259844820 is an abundant number, since it is smaller than the sum of its proper divisors (472211820).

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

259844820 is an frugal number, since it uses more digits than its factorization.

259844820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 259844820 is about 16119.7028508593. The cubic root of 259844820 is about 638.1234255105.

The spelling of 259844820 in words is "two hundred fifty-nine million, eight hundred forty-four thousand, eight hundred twenty".