45638272 has 16 divisors (see below), whose sum is σ = 90920250. Its totient is φ = 22819072.

The previous prime is 45638267. The next prime is 45638273. The reversal of 45638272 is 27283654.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 17505856 = 5304^2 + 4184^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×45638272² = 4165703742291968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45638273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178147 + ... + 178402.

Almost surely, 2^45638272 is an apocalyptic number.

It is an amenable number.

45638272 is a deficient number, since it is larger than the sum of its proper divisors (45281978).

45638272 is an equidigital number, since it uses as much as digits as its factorization.

45638272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356563 (or 356551 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 45638272 is about 6755.6104091340. The cubic root of 45638272 is about 357.3631197170.

The spelling of 45638272 in words is "forty-five million, six hundred thirty-eight thousand, two hundred seventy-two".