258091868 has 6 divisors (see below), whose sum is σ = 451660776. Its totient is φ = 129045932.

The previous prime is 258091861. The next prime is 258091871. The reversal of 258091868 is 868190852.

It is a super-2 number, since 2×258091868² = 133222824655458848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258091861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32261480 + ... + 32261487.

It is an arithmetic number, because the mean of its divisors is an integer number (75276796).

Almost surely, 2^258091868 is an apocalyptic number.

It is an amenable number.

258091868 is a deficient number, since it is larger than the sum of its proper divisors (193568908).

258091868 is a wasteful number, since it uses less digits than its factorization.

258091868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64522971 (or 64522969 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 258091868 is about 16065.2378756121. The cubic root of 258091868 is about 636.6852278730.

The spelling of 258091868 in words is "two hundred fifty-eight million, ninety-one thousand, eight hundred sixty-eight".