5438472638 has 16 divisors (see below), whose sum is σ = 8588584320. Its totient is φ = 2575661976.

The previous prime is 5438472617. The next prime is 5438472643. The reversal of 5438472638 is 8362748345.

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 7 ways as a sum of consecutive naturals, for example, 313295 + ... + 330197.

It is an arithmetic number, because the mean of its divisors is an integer number (536786520).

Almost surely, 2^5438472638 is an apocalyptic number.

5438472638 is a deficient number, since it is larger than the sum of its proper divisors (3150111682).

5438472638 is a wasteful number, since it uses less digits than its factorization.

5438472638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25391.

The product of its digits is 3870720, while the sum is 50.

The square root of 5438472638 is about 73746.0008271635. Note that the first 3 decimals coincide. The cubic root of 5438472638 is about 1758.5672566290.

The spelling of 5438472638 in words is "five billion, four hundred thirty-eight million, four hundred seventy-two thousand, six hundred thirty-eight".