45140238 has 144 divisors (see below), whose sum is σ = 123327360. Its totient is φ = 11793600.

The previous prime is 45140231. The next prime is 45140261. The reversal of 45140238 is 83204154.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45140231) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 635743 + ... + 635813.

It is an arithmetic number, because the mean of its divisors is an integer number (856440).

Almost surely, 2^45140238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45140238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61663680).

45140238 is an abundant number, since it is smaller than the sum of its proper divisors (78187122).

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

45140238 is a wasteful number, since it uses less digits than its factorization.

45140238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 45140238 is about 6718.6485248151. The cubic root of 45140238 is about 356.0584373623.

The spelling of 45140238 in words is "forty-five million, one hundred forty thousand, two hundred thirty-eight".