2138684229 has 40 divisors (see below), whose sum is σ = 3491618592. Its totient is φ = 1293809760.

The previous prime is 2138684179. The next prime is 2138684263. The reversal of 2138684229 is 9224868312.

2138684229 is a `hidden beast` number, since 213 + 8 + 6 + 8 + 422 + 9 = 666.

It is not a de Polignac number, because 2138684229 - 2¹¹ = 2138682181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138684729) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 571047 + ... + 574779.

Almost surely, 2^2138684229 is an apocalyptic number.

It is an amenable number.

2138684229 is a deficient number, since it is larger than the sum of its proper divisors (1352934363).

2138684229 is a wasteful number, since it uses less digits than its factorization.

2138684229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399 (or 4390 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 2138684229 is about 46245.9104029751. The cubic root of 2138684229 is about 1288.3945793913.

The spelling of 2138684229 in words is "two billion, one hundred thirty-eight million, six hundred eighty-four thousand, two hundred twenty-nine".