28329632 has 12 divisors (see below), whose sum is σ = 55774026. Its totient is φ = 14164800.

The previous prime is 28329557. The next prime is 28329649. The reversal of 28329632 is 23692382.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 913936 = 5236^2 + 956^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28329592 and 28329601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442619 + ... + 442682.

Almost surely, 2^28329632 is an apocalyptic number.

It is an amenable number.

28329632 is a deficient number, since it is larger than the sum of its proper divisors (27444394).

28329632 is an equidigital number, since it uses as much as digits as its factorization.

28329632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885311 (or 885303 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 28329632 is about 5322.5587831418. The cubic root of 28329632 is about 304.8458667597.

The spelling of 28329632 in words is "twenty-eight million, three hundred twenty-nine thousand, six hundred thirty-two".