4638144436 has 24 divisors (see below), whose sum is σ = 8155292544. Its totient is φ = 2308088640.

The previous prime is 4638144421. The next prime is 4638144457. The reversal of 4638144436 is 6344418364.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4638144392 and 4638144401.

It is a congruent number.

It is an unprimeable number.

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, 760696 + ... + 766768.

It is an arithmetic number, because the mean of its divisors is an integer number (339803856).

Almost surely, 2^4638144436 is an apocalyptic number.

It is an amenable number.

4638144436 is a deficient number, since it is larger than the sum of its proper divisors (3517148108).

4638144436 is a wasteful number, since it uses less digits than its factorization.

4638144436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951 (or 6949 counting only the distinct ones).

The product of its digits is 663552, while the sum is 43.

The square root of 4638144436 is about 68103.9237929798. The cubic root of 4638144436 is about 1667.6878176537.

The spelling of 4638144436 in words is "four billion, six hundred thirty-eight million, one hundred forty-four thousand, four hundred thirty-six".