2138988 has 12 divisors (see below), whose sum is σ = 4991000. Its totient is φ = 712992.

The previous prime is 2138987. The next prime is 2138989. The reversal of 2138988 is 8898312.

It is an interprime number because it is at equal distance from previous prime (2138987) and next prime (2138989).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2138987) 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, 89113 + ... + 89136.

2^2138988 is an apocalyptic number.

It is an amenable number.

2138988 is an abundant number, since it is smaller than the sum of its proper divisors (2852012).

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

2138988 is a wasteful number, since it uses less digits than its factorization.

2138988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178256 (or 178254 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 2138988 is about 1462.5279484509. The cubic root of 2138988 is about 128.8455576144.

The spelling of 2138988 in words is "two million, one hundred thirty-eight thousand, nine hundred eighty-eight".