45638209 has 8 divisors (see below), whose sum is σ = 48537440. Its totient is φ = 42788736.

The previous prime is 45638147. The next prime is 45638227. The reversal of 45638209 is 90283654.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45638209 - 2¹¹ = 45636161 is a prime.

It is a super-2 number, since 2×45638209² = 4165692241455362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45638249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10539 + ... + 14224.

It is an arithmetic number, because the mean of its divisors is an integer number (6067180).

Almost surely, 2^45638209 is an apocalyptic number.

It is an amenable number.

45638209 is a deficient number, since it is larger than the sum of its proper divisors (2899231).

45638209 is a wasteful number, since it uses less digits than its factorization.

45638209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24879.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 45638209 is about 6755.6057463413. The cubic root of 45638209 is about 357.3629552798.

The spelling of 45638209 in words is "forty-five million, six hundred thirty-eight thousand, two hundred nine".