258236664 has 96 divisors (see below), whose sum is σ = 795232080. Its totient is φ = 69436416.

The previous prime is 258236623. The next prime is 258236669. The reversal of 258236664 is 466632852.

It is a happy number.

258236664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258236669) 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, 13534 + ... + 26450.

Almost surely, 2^258236664 is an apocalyptic number.

258236664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258236664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397616040).

258236664 is an abundant number, since it is smaller than the sum of its proper divisors (536995416).

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

258236664 is a wasteful number, since it uses less digits than its factorization.

258236664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12957 (or 12946 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 258236664 is about 16069.7437440676. The cubic root of 258236664 is about 636.8042710651.

The spelling of 258236664 in words is "two hundred fifty-eight million, two hundred thirty-six thousand, six hundred sixty-four".