2138687700 has 72 divisors (see below), whose sum is σ = 6192749472. Its totient is φ = 569873280.

The previous prime is 2138687699. The next prime is 2138687717. The reversal of 2138687700 is 77868312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 606342 + ... + 609858.

Almost surely, 2^2138687700 is an apocalyptic number.

2138687700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2138687700 is an abundant number, since it is smaller than the sum of its proper divisors (4054061772).

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

2138687700 is a wasteful number, since it uses less digits than its factorization.

2138687700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5554 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2138687700 is about 46245.9479306025. The cubic root of 2138687700 is about 1288.3952763954.

The spelling of 2138687700 in words is "two billion, one hundred thirty-eight million, six hundred eighty-seven thousand, seven hundred".