639287352 has 48 divisors (see below), whose sum is σ = 1888805880. Its totient is φ = 193723200.

The previous prime is 639287351. The next prime is 639287359. The reversal of 639287352 is 253782936.

639287352 is a `hidden beast` number, since 639 + 2 + 8 + 7 + 3 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 639287298 and 639287307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639287351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402799 + ... + 404382.

Almost surely, 2^639287352 is an apocalyptic number.

It is an amenable number.

639287352 is an abundant number, since it is smaller than the sum of its proper divisors (1249518528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

639287352 is a wasteful number, since it uses less digits than its factorization.

639287352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807204 (or 807197 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 639287352 is about 25284.1324154103. The cubic root of 639287352 is about 861.4538918869.

The spelling of 639287352 in words is "six hundred thirty-nine million, two hundred eighty-seven thousand, three hundred fifty-two".