639360029 has 16 divisors (see below), whose sum is σ = 809028096. Its totient is φ = 490762800.

The previous prime is 639360017. The next prime is 639360031. The reversal of 639360029 is 920063936.

It is not a de Polignac number, because 639360029 - 2¹² = 639355933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639359974 and 639360001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639360229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56807 + ... + 67124.

It is an arithmetic number, because the mean of its divisors is an integer number (50564256).

Almost surely, 2^639360029 is an apocalyptic number.

It is an amenable number.

639360029 is a deficient number, since it is larger than the sum of its proper divisors (169668067).

639360029 is a wasteful number, since it uses less digits than its factorization.

639360029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124016.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 639360029 is about 25285.5695802962. The cubic root of 639360029 is about 861.4865352733.

The spelling of 639360029 in words is "six hundred thirty-nine million, three hundred sixty thousand, twenty-nine".