45538218 has 48 divisors (see below), whose sum is σ = 108108000. Its totient is φ = 13739040.

The previous prime is 45538217. The next prime is 45538267. The reversal of 45538218 is 81283554.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45538211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68773 + ... + 69431.

It is an arithmetic number, because the mean of its divisors is an integer number (2252250).

Almost surely, 2^45538218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45538218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54054000).

45538218 is an abundant number, since it is smaller than the sum of its proper divisors (62569782).

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

45538218 is a wasteful number, since it uses less digits than its factorization.

45538218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1024 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 45538218 is about 6748.2010936249. The cubic root of 45538218 is about 357.1017764101.

The spelling of 45538218 in words is "forty-five million, five hundred thirty-eight thousand, two hundred eighteen".