2139384858 has 48 divisors (see below), whose sum is σ = 4681204416. Its totient is φ = 651456000.

The previous prime is 2139384853. The next prime is 2139384883. The reversal of 2139384858 is 8584839312.

2139384858 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2139384858.

It is not an unprimeable number, because it can be changed into a prime (2139384853) 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, 87483 + ... + 109233.

It is an arithmetic number, because the mean of its divisors is an integer number (97525092).

Almost surely, 2^2139384858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139384858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340602208).

2139384858 is an abundant number, since it is smaller than the sum of its proper divisors (2541819558).

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

2139384858 is a wasteful number, since it uses less digits than its factorization.

2139384858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21879 (or 21866 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 2139384858 is about 46253.4848200652. The cubic root of 2139384858 is about 1288.5352559248.

The spelling of 2139384858 in words is "two billion, one hundred thirty-nine million, three hundred eighty-four thousand, eight hundred fifty-eight".