28632481 has 2 divisors, whose sum is σ = 28632482. Its totient is φ = 28632480.

The previous prime is 28632467. The next prime is 28632497. The reversal of 28632481 is 18423682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 11451456 = 4145^2 + 3384^2 .

It is a cyclic number.

It is not a de Polignac number, because 28632481 - 2¹⁷ = 28501409 is a prime.

It is a super-2 number, since 2×28632481² = 1639637936430722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28632781) 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 as a sum of consecutive naturals, namely, 14316240 + 14316241.

It is an arithmetic number, because the mean of its divisors is an integer number (14316241).

Almost surely, 2^28632481 is an apocalyptic number.

It is an amenable number.

28632481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28632481 is an equidigital number, since it uses as much as digits as its factorization.

28632481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 28632481 is about 5350.9327224326. The cubic root of 28632481 is about 305.9283049314.

The spelling of 28632481 in words is "twenty-eight million, six hundred thirty-two thousand, four hundred eighty-one".