28632385 has 4 divisors (see below), whose sum is σ = 34358868. Its totient is φ = 22905904.

The previous prime is 28632379. The next prime is 28632397. The reversal of 28632385 is 58323682.

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 19775809 + 8856576 = 4447^2 + 2976^2 .

It is a cyclic number.

It is not a de Polignac number, because 28632385 - 2⁷ = 28632257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863234 + ... + 2863243.

It is an arithmetic number, because the mean of its divisors is an integer number (8589717).

Almost surely, 2^28632385 is an apocalyptic number.

It is an amenable number.

28632385 is a deficient number, since it is larger than the sum of its proper divisors (5726483).

28632385 is an equidigital number, since it uses as much as digits as its factorization.

28632385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726482.

The product of its digits is 69120, while the sum is 37.

The square root of 28632385 is about 5350.9237520264. The cubic root of 28632385 is about 305.9279630220.

The spelling of 28632385 in words is "twenty-eight million, six hundred thirty-two thousand, three hundred eighty-five".