2165732438 has 8 divisors (see below), whose sum is σ = 3262191840. Its totient is φ = 1078335160.

The previous prime is 2165732419. The next prime is 2165732477. The reversal of 2165732438 is 8342375612.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2165732395 and 2165732404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264933 + ... + 2265888.

It is an arithmetic number, because the mean of its divisors is an integer number (407773980).

Almost surely, 2^2165732438 is an apocalyptic number.

2165732438 is a deficient number, since it is larger than the sum of its proper divisors (1096459402).

2165732438 is a wasteful number, since it uses less digits than its factorization.

2165732438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531062.

The product of its digits is 241920, while the sum is 41.

The square root of 2165732438 is about 46537.4305049172. The cubic root of 2165732438 is about 1293.8033375351.

The spelling of 2165732438 in words is "two billion, one hundred sixty-five million, seven hundred thirty-two thousand, four hundred thirty-eight".