45538 has 4 divisors (see below), whose sum is σ = 68310. Its totient is φ = 22768.

The previous prime is 45533. The next prime is 45541. The reversal of 45538 is 83554.

It is a happy number.

45538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83554 = 2 ⋅41777.

It can be written as a sum of positive squares in only one way, i.e., 45369 + 169 = 213^2 + 13^2 .

It is not an unprimeable number, because it can be changed into a prime (45533) by changing a digit.

45538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11383 + ... + 11386.

2⁴⁵⁵³⁸ is an apocalyptic number.

45538 is a deficient number, since it is larger than the sum of its proper divisors (22772).

45538 is a wasteful number, since it uses less digits than its factorization.

45538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22771.

The product of its digits is 2400, while the sum is 25.

The square root of 45538 is about 213.3963448609. The cubic root of 45538 is about 35.7101206571.

The spelling of 45538 in words is "forty-five thousand, five hundred thirty-eight".