258765140 has 24 divisors (see below), whose sum is σ = 545748840. Its totient is φ = 103059968.

The previous prime is 258765137. The next prime is 258765181. The reversal of 258765140 is 41567852.

It can be written as a sum of positive squares in 4 ways, for example, as 9314704 + 249450436 = 3052^2 + 15794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 258765094 and 258765103.

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, 23105 + ... + 32424.

It is an arithmetic number, because the mean of its divisors is an integer number (22739535).

Almost surely, 2^258765140 is an apocalyptic number.

258765140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258765140 is an abundant number, since it is smaller than the sum of its proper divisors (286983700).

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

258765140 is a wasteful number, since it uses less digits than its factorization.

258765140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55771 (or 55769 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 258765140 is about 16086.1785393548. The cubic root of 258765140 is about 637.2383773331.

The spelling of 258765140 in words is "two hundred fifty-eight million, seven hundred sixty-five thousand, one hundred forty".