49996638 has 72 divisors (see below), whose sum is σ = 119644200. Its totient is φ = 15029280.

The previous prime is 49996633. The next prime is 49996663. The reversal of 49996638 is 83669994.

It is a happy number.

49996638 is a `hidden beast` number, since 499 + 96 + 63 + 8 = 666.

It is a super-2 number, since 2×49996638² = 4999327622606088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49996631) 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 35 ways as a sum of consecutive naturals, for example, 704143 + ... + 704213.

It is an arithmetic number, because the mean of its divisors is an integer number (1661725).

Almost surely, 2^49996638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49996638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59822100).

49996638 is an abundant number, since it is smaller than the sum of its proper divisors (69647562).

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

49996638 is a wasteful number, since it uses less digits than its factorization.

49996638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 124 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 49996638 is about 7070.8300785693. The cubic root of 49996638 is about 368.3948925364.

The spelling of 49996638 in words is "forty-nine million, nine hundred ninety-six thousand, six hundred thirty-eight".