4392138445 has 8 divisors (see below), whose sum is σ = 5580599544. Its totient is φ = 3307021824.

The previous prime is 4392138433. The next prime is 4392138449. The reversal of 4392138445 is 5448312934.

It can be written as a sum of positive squares in 4 ways, for example, as 2275862436 + 2116276009 = 47706^2 + 46003^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4392138445 - 2¹⁵ = 4392105677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4392138449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25836024 + ... + 25836193.

It is an arithmetic number, because the mean of its divisors is an integer number (697574943).

Almost surely, 2^4392138445 is an apocalyptic number.

It is an amenable number.

4392138445 is a deficient number, since it is larger than the sum of its proper divisors (1188461099).

4392138445 is a wasteful number, since it uses less digits than its factorization.

4392138445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51672239.

The product of its digits is 414720, while the sum is 43.

The square root of 4392138445 is about 66273.2106133391. The cubic root of 4392138445 is about 1637.6660292000. Note that the first 3 decimals are identical.

The spelling of 4392138445 in words is "four billion, three hundred ninety-two million, one hundred thirty-eight thousand, four hundred forty-five".