259987820 has 24 divisors (see below), whose sum is σ = 547259328. Its totient is φ = 103750400.

The previous prime is 259987799. The next prime is 259987823. The reversal of 259987820 is 28789952.

It is not an unprimeable number, because it can be changed into a prime (259987823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6461 + ... + 23700.

It is an arithmetic number, because the mean of its divisors is an integer number (22802472).

Almost surely, 2^259987820 is an apocalyptic number.

259987820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

259987820 is an abundant number, since it is smaller than the sum of its proper divisors (287271508).

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

259987820 is a wasteful number, since it uses less digits than its factorization.

259987820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30601 (or 30599 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 259987820 is about 16124.1378064069. The cubic root of 259987820 is about 638.2404632044.

The spelling of 259987820 in words is "two hundred fifty-nine million, nine hundred eighty-seven thousand, eight hundred twenty".