2138404634 has 8 divisors (see below), whose sum is σ = 3230683680. Its totient is φ = 1061510076.

The previous prime is 2138404633. The next prime is 2138404643. The reversal of 2138404634 is 4364048312.

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

It is a super-4 number, since 4×2138404634⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2138404594 and 2138404603.

It is not an unprimeable number, because it can be changed into a prime (2138404633) 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, 3845774 + ... + 3846329.

It is an arithmetic number, because the mean of its divisors is an integer number (403835460).

Almost surely, 2^2138404634 is an apocalyptic number.

2138404634 is a deficient number, since it is larger than the sum of its proper divisors (1092279046).

2138404634 is a wasteful number, since it uses less digits than its factorization.

2138404634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692244.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 2138404634 is about 46242.8873882244. The cubic root of 2138404634 is about 1288.3384320373.

The spelling of 2138404634 in words is "two billion, one hundred thirty-eight million, four hundred four thousand, six hundred thirty-four".