2138891262 has 8 divisors (see below), whose sum is σ = 4277782536. Its totient is φ = 712963752.

The previous prime is 2138891243. The next prime is 2138891269. The reversal of 2138891262 is 2621988312.

It is a sphenic number, since it is the product of 3 distinct primes.

2138891262 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138891269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178240933 + ... + 178240944.

It is an arithmetic number, because the mean of its divisors is an integer number (534722817).

Almost surely, 2^2138891262 is an apocalyptic number.

2138891262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2138891262 is a wasteful number, since it uses less digits than its factorization.

2138891262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356481882.

The product of its digits is 82944, while the sum is 42.

The square root of 2138891262 is about 46248.1487413280. The cubic root of 2138891262 is about 1288.4361519284.

The spelling of 2138891262 in words is "two billion, one hundred thirty-eight million, eight hundred ninety-one thousand, two hundred sixty-two".