258057856 has 64 divisors (see below), whose sum is σ = 591192000. Its totient is φ = 109910016.

The previous prime is 258057797. The next prime is 258057859. The reversal of 258057856 is 658750852.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258057859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159580 + ... + 161188.

It is an arithmetic number, because the mean of its divisors is an integer number (9237375).

Almost surely, 2^258057856 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 258057856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295596000).

258057856 is an abundant number, since it is smaller than the sum of its proper divisors (333134144).

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

258057856 is a wasteful number, since it uses less digits than its factorization.

258057856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809 (or 1797 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 258057856 is about 16064.1792818681. The cubic root of 258057856 is about 636.6572586471.

The spelling of 258057856 in words is "two hundred fifty-eight million, fifty-seven thousand, eight hundred fifty-six".