2138432 has 14 divisors (see below), whose sum is σ = 4243578. Its totient is φ = 1069184.

The previous prime is 2138429. The next prime is 2138467. The reversal of 2138432 is 2348312.

It can be written as a sum of positive squares in only one way, i.e., 2119936 + 18496 = 1456^2 + 136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2138398 and 2138407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16643 + ... + 16770.

2^2138432 is an apocalyptic number.

It is an amenable number.

2138432 is a deficient number, since it is larger than the sum of its proper divisors (2105146).

2138432 is an equidigital number, since it uses as much as digits as its factorization.

2138432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33425 (or 33415 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2138432 is about 1462.3378542594. The cubic root of 2138432 is about 128.8343927804.

The spelling of 2138432 in words is "two million, one hundred thirty-eight thousand, four hundred thirty-two".