2171000838 has 16 divisors (see below), whose sum is σ = 4570528320. Its totient is φ = 685579176.

The previous prime is 2171000791. The next prime is 2171000879. The reversal of 2171000838 is 8380001712.

It is a happy number.

It is a congruent number.

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, 9521820 + ... + 9522047.

It is an arithmetic number, because the mean of its divisors is an integer number (285658020).

Almost surely, 2^2171000838 is an apocalyptic number.

2171000838 is an abundant number, since it is smaller than the sum of its proper divisors (2399527482).

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

2171000838 is a wasteful number, since it uses less digits than its factorization.

2171000838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19043891.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 2171000838 is about 46594.0000214620. Note that the first 4 decimals coincide. The cubic root of 2171000838 is about 1294.8515978082.

The spelling of 2171000838 in words is "two billion, one hundred seventy-one million, eight hundred thirty-eight", and thus it is an aban number.