28632361 has 4 divisors (see below), whose sum is σ = 28675332. Its totient is φ = 28589392.

The previous prime is 28632343. The next prime is 28632371. The reversal of 28632361 is 16323682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 8156736 = 4525^2 + 2856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28632361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28632311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20470 + ... + 21823.

It is an arithmetic number, because the mean of its divisors is an integer number (7168833).

Almost surely, 2^28632361 is an apocalyptic number.

It is an amenable number.

28632361 is a deficient number, since it is larger than the sum of its proper divisors (42971).

28632361 is an equidigital number, since it uses as much as digits as its factorization.

28632361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42970.

The product of its digits is 10368, while the sum is 31.

The square root of 28632361 is about 5350.9215094225. The cubic root of 28632361 is about 305.9278775445.

The spelling of 28632361 in words is "twenty-eight million, six hundred thirty-two thousand, three hundred sixty-one".