258275640 has 64 divisors (see below), whose sum is σ = 885519360. Its totient is φ = 59034240.

The previous prime is 258275639. The next prime is 258275681. The reversal of 258275640 is 46572852.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152896 + ... + 154575.

It is an arithmetic number, because the mean of its divisors is an integer number (13836240).

Almost surely, 2^258275640 is an apocalyptic number.

258275640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258275640 is an abundant number, since it is smaller than the sum of its proper divisors (627243720).

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

258275640 is a wasteful number, since it uses less digits than its factorization.

258275640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307492 (or 307488 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 258275640 is about 16070.9564121119. The cubic root of 258275640 is about 636.8363073560.

The spelling of 258275640 in words is "two hundred fifty-eight million, two hundred seventy-five thousand, six hundred forty".