258740685 has 96 divisors (see below), whose sum is σ = 543449088. Its totient is φ = 111323520.

The previous prime is 258740681. The next prime is 258740701. The reversal of 258740685 is 586047852.

258740685 is a `hidden beast` number, since 2 + 587 + 4 + 0 + 68 + 5 = 666.

It is not a de Polignac number, because 258740685 - 2² = 258740681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 258740685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258740681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 514144 + ... + 514646.

It is an arithmetic number, because the mean of its divisors is an integer number (5660928).

Almost surely, 2^258740685 is an apocalyptic number.

It is an amenable number.

258740685 is an abundant number, since it is smaller than the sum of its proper divisors (284708403).

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

258740685 is a wasteful number, since it uses less digits than its factorization.

258740685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 258740685 is about 16085.4183967965. The cubic root of 258740685 is about 637.2183023010.

The spelling of 258740685 in words is "two hundred fifty-eight million, seven hundred forty thousand, six hundred eighty-five".