258535240 has 16 divisors (see below), whose sum is σ = 581704380. Its totient is φ = 103414080.

The previous prime is 258535237. The next prime is 258535241. The reversal of 258535240 is 42535852.

It can be written as a sum of positive squares in 2 ways, for example, as 252746404 + 5788836 = 15898^2 + 2406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 258535196 and 258535205.

It is not an unprimeable number, because it can be changed into a prime (258535241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3231651 + ... + 3231730.

Almost surely, 2^258535240 is an apocalyptic number.

258535240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258535240 is an abundant number, since it is smaller than the sum of its proper divisors (323169140).

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

258535240 is a wasteful number, since it uses less digits than its factorization.

258535240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463392 (or 6463388 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 258535240 is about 16079.0310653348. The cubic root of 258535240 is about 637.0496031797.

The spelling of 258535240 in words is "two hundred fifty-eight million, five hundred thirty-five thousand, two hundred forty".