2139617128 has 64 divisors (see below), whose sum is σ = 4487037120. Its totient is φ = 948288000.

The previous prime is 2139617101. The next prime is 2139617141. The reversal of 2139617128 is 8217169312.

It is a super-2 number, since 2×2139617128² = 9155922908861936768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593700 + ... + 597292.

It is an arithmetic number, because the mean of its divisors is an integer number (70109955).

Almost surely, 2^2139617128 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 2139617128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2243518560).

2139617128 is an abundant number, since it is smaller than the sum of its proper divisors (2347419992).

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

2139617128 is a wasteful number, since it uses less digits than its factorization.

2139617128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778 (or 3774 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 2139617128 is about 46255.9955897611. The cubic root of 2139617128 is about 1288.5818857232.

The spelling of 2139617128 in words is "two billion, one hundred thirty-nine million, six hundred seventeen thousand, one hundred twenty-eight".