2138522936 has 64 divisors (see below), whose sum is σ = 4576642560. Its totient is φ = 928096000.

The previous prime is 2138522891. The next prime is 2138523019. The reversal of 2138522936 is 6392258312.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 2138522893 and 2138522902.

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 15 ways as a sum of consecutive naturals, for example, 163271 + ... + 175881.

It is an arithmetic number, because the mean of its divisors is an integer number (71510040).

Almost surely, 2^2138522936 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 2138522936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288321280).

2138522936 is an abundant number, since it is smaller than the sum of its proper divisors (2438119624).

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

2138522936 is a wasteful number, since it uses less digits than its factorization.

2138522936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716 (or 12712 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 2138522936 is about 46244.1665077878. The cubic root of 2138522936 is about 1288.3621896555.

The spelling of 2138522936 in words is "two billion, one hundred thirty-eight million, five hundred twenty-two thousand, nine hundred thirty-six".