639029948 has 24 divisors (see below), whose sum is σ = 1137754128. Its totient is φ = 313998336.

The previous prime is 639029917. The next prime is 639029959. The reversal of 639029948 is 849920936.

639029948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 639029896 and 639029905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59090 + ... + 69062.

It is an arithmetic number, because the mean of its divisors is an integer number (47406422).

Almost surely, 2^639029948 is an apocalyptic number.

It is an amenable number.

639029948 is a deficient number, since it is larger than the sum of its proper divisors (498724180).

639029948 is a wasteful number, since it uses less digits than its factorization.

639029948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253 (or 10251 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 639029948 is about 25279.0416748737. The cubic root of 639029948 is about 861.3382571652.

The spelling of 639029948 in words is "six hundred thirty-nine million, twenty-nine thousand, nine hundred forty-eight".