258863881 has 4 divisors (see below), whose sum is σ = 258905872. Its totient is φ = 258821892.

The previous prime is 258863863. The next prime is 258863897. The reversal of 258863881 is 188368852.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 258863881 - 2⁷ = 258863753 is a prime.

It is a super-2 number, since 2×258863881² = 134021017772764322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258863821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9735 + ... + 24748.

It is an arithmetic number, because the mean of its divisors is an integer number (64726468).

Almost surely, 2^258863881 is an apocalyptic number.

It is an amenable number.

258863881 is a deficient number, since it is larger than the sum of its proper divisors (41991).

258863881 is an equidigital number, since it uses as much as digits as its factorization.

258863881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41990.

The product of its digits is 737280, while the sum is 49.

The square root of 258863881 is about 16089.2473720805. The cubic root of 258863881 is about 637.3194206465.

The spelling of 258863881 in words is "two hundred fifty-eight million, eight hundred sixty-three thousand, eight hundred eighty-one".