49765638 has 32 divisors (see below), whose sum is σ = 108493056. Its totient is φ = 15126048.

The previous prime is 49765631. The next prime is 49765679. The reversal of 49765638 is 83656794.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49765631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2631 + ... + 10317.

It is an arithmetic number, because the mean of its divisors is an integer number (3390408).

Almost surely, 2^49765638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49765638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54246528).

49765638 is an abundant number, since it is smaller than the sum of its proper divisors (58727418).

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

49765638 is a wasteful number, since it uses less digits than its factorization.

49765638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7788.

The product of its digits is 1088640, while the sum is 48.

The square root of 49765638 is about 7054.4764511621. The cubic root of 49765638 is about 367.8266501995.

It can be divided in two parts, 49765 and 638, that added together give a triangular number (50403 = T₃₁₇).

The spelling of 49765638 in words is "forty-nine million, seven hundred sixty-five thousand, six hundred thirty-eight".