2158905258 has 64 divisors (see below), whose sum is σ = 5045944320. Its totient is φ = 682876656.

The previous prime is 2158905251. The next prime is 2158905269. The reversal of 2158905258 is 8525098512.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2158905251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150891 + ... + 164577.

It is an arithmetic number, because the mean of its divisors is an integer number (78842880).

Almost surely, 2^2158905258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2158905258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2522972160).

2158905258 is an abundant number, since it is smaller than the sum of its proper divisors (2887039062).

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

2158905258 is a wasteful number, since it uses less digits than its factorization.

2158905258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13848 (or 13842 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The square root of 2158905258 is about 46464.0211131150. The cubic root of 2158905258 is about 1292.4423928422.

The spelling of 2158905258 in words is "two billion, one hundred fifty-eight million, nine hundred five thousand, two hundred fifty-eight".