258086988 has 72 divisors (see below), whose sum is σ = 679704480. Its totient is φ = 82494720.

The previous prime is 258086981. The next prime is 258087007. The reversal of 258086988 is 889680852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258086981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93208 + ... + 95936.

It is an arithmetic number, because the mean of its divisors is an integer number (9440340).

Almost surely, 2^258086988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258086988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339852240).

258086988 is an abundant number, since it is smaller than the sum of its proper divisors (421617492).

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

258086988 is a wasteful number, since it uses less digits than its factorization.

258086988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The square root of 258086988 is about 16065.0859941676. The cubic root of 258086988 is about 636.6812150338.

The spelling of 258086988 in words is "two hundred fifty-eight million, eighty-six thousand, nine hundred eighty-eight".