2158844608 has 56 divisors (see below), whose sum is σ = 4428329472. Its totient is φ = 1043606784.

The previous prime is 2158844521. The next prime is 2158844617. The reversal of 2158844608 is 8064488512.

It is a super-2 number, since 2×2158844608² = 9321220082981347328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245341 + ... + 253987.

It is an arithmetic number, because the mean of its divisors is an integer number (79077312).

Almost surely, 2^2158844608 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 2158844608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214164736).

2158844608 is an abundant number, since it is smaller than the sum of its proper divisors (2269484864).

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

2158844608 is an equidigital number, since it uses as much as digits as its factorization.

2158844608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8789 (or 8779 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 46.

The square root of 2158844608 is about 46463.3684530082. The cubic root of 2158844608 is about 1292.4302898925.

The spelling of 2158844608 in words is "two billion, one hundred fifty-eight million, eight hundred forty-four thousand, six hundred eight".