50639986 has 8 divisors (see below), whose sum is σ = 76712364. Its totient is φ = 25069200.

The previous prime is 50639971. The next prime is 50640011. The reversal of 50639986 is 68993605.

It can be written as a sum of positive squares in 2 ways, for example, as 46498761 + 4141225 = 6819^2 + 2035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 125145 + ... + 125548.

Almost surely, 2^50639986 is an apocalyptic number.

50639986 is a deficient number, since it is larger than the sum of its proper divisors (26072378).

50639986 is a wasteful number, since it uses less digits than its factorization.

50639986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250796.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 50639986 is about 7116.1777661888. The cubic root of 50639986 is about 369.9683099228.

The spelling of 50639986 in words is "fifty million, six hundred thirty-nine thousand, nine hundred eighty-six".