638473546 has 16 divisors (see below), whose sum is σ = 980733600. Its totient is φ = 311573808.

The previous prime is 638473543. The next prime is 638473559. The reversal of 638473546 is 645374836.

It is a junction number, because it is equal to n+sod(n) for n = 638473496 and 638473505.

It is not an unprimeable number, because it can be changed into a prime (638473543) by changing a digit.

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, 172665 + ... + 176323.

It is an arithmetic number, because the mean of its divisors is an integer number (61295850).

Almost surely, 2^638473546 is an apocalyptic number.

638473546 is a deficient number, since it is larger than the sum of its proper divisors (342260054).

638473546 is a wasteful number, since it uses less digits than its factorization.

638473546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733.

The product of its digits is 1451520, while the sum is 46.

The square root of 638473546 is about 25268.0340746960. The cubic root of 638473546 is about 861.0881961199.

The spelling of 638473546 in words is "six hundred thirty-eight million, four hundred seventy-three thousand, five hundred forty-six".