49639806 has 12 divisors (see below), whose sum is σ = 107552952. Its totient is φ = 16546596.

The previous prime is 49639801. The next prime is 49639817. The reversal of 49639806 is 60893694.

49639806 is a `hidden beast` number, since 4 + 9 + 639 + 8 + 0 + 6 = 666.

It is a super-2 number, since 2×49639806² = 4928220679435272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1378866 + ... + 1378901.

It is an arithmetic number, because the mean of its divisors is an integer number (8962746).

Almost surely, 2^49639806 is an apocalyptic number.

49639806 is an abundant number, since it is smaller than the sum of its proper divisors (57913146).

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

49639806 is a wasteful number, since it uses less digits than its factorization.

49639806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757775 (or 2757772 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 49639806 is about 7045.5522139858. The cubic root of 49639806 is about 367.5163730037.

The spelling of 49639806 in words is "forty-nine million, six hundred thirty-nine thousand, eight hundred six".