259745780 has 24 divisors (see below), whose sum is σ = 623390208. Its totient is φ = 89055648.

The previous prime is 259745777. The next prime is 259745791. The reversal of 259745780 is 87547952.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927524 + ... + 927803.

It is an arithmetic number, because the mean of its divisors is an integer number (25974592).

Almost surely, 2^259745780 is an apocalyptic number.

259745780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

259745780 is an abundant number, since it is smaller than the sum of its proper divisors (363644428).

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

259745780 is a wasteful number, since it uses less digits than its factorization.

259745780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855343 (or 1855341 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 259745780 is about 16116.6305411522. The cubic root of 259745780 is about 638.0423415065.

The spelling of 259745780 in words is "two hundred fifty-nine million, seven hundred forty-five thousand, seven hundred eighty".