639005486 has 16 divisors (see below), whose sum is σ = 1159875936. Its totient is φ = 257750016.

The previous prime is 639005447. The next prime is 639005489. The reversal of 639005486 is 684500936.

639005486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×639005486² = 816656022276192392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639005489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342211 + ... + 1342686.

It is an arithmetic number, because the mean of its divisors is an integer number (72492246).

Almost surely, 2^639005486 is an apocalyptic number.

639005486 is a deficient number, since it is larger than the sum of its proper divisors (520870450).

639005486 is a wasteful number, since it uses less digits than its factorization.

639005486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684923.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 639005486 is about 25278.5578306991. The cubic root of 639005486 is about 861.3272663786.

The spelling of 639005486 in words is "six hundred thirty-nine million, five thousand, four hundred eighty-six".