49533138 has 24 divisors (see below), whose sum is σ = 113635548. Its totient is φ = 15539712.

The previous prime is 49533137. The next prime is 49533149. The reversal of 49533138 is 83133594.

49533138 is a `hidden beast` number, since 495 + 33 + 138 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49238289 + 294849 = 7017^2 + 543^2 .

It is not an unprimeable number, because it can be changed into a prime (49533137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80631 + ... + 81242.

Almost surely, 2^49533138 is an apocalyptic number.

49533138 is an abundant number, since it is smaller than the sum of its proper divisors (64102410).

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

49533138 is a wasteful number, since it uses less digits than its factorization.

49533138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161898 (or 161895 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 49533138 is about 7037.9782608360. The cubic root of 49533138 is about 367.2529395956.

It can be divided in two parts, 495 and 33138, that added together give a palindrome (33633).

The spelling of 49533138 in words is "forty-nine million, five hundred thirty-three thousand, one hundred thirty-eight".