28920032 has 12 divisors (see below), whose sum is σ = 56936376. Its totient is φ = 14460000.

The previous prime is 28920029. The next prime is 28920041. The reversal of 28920032 is 23002982.

It is a junction number, because it is equal to n+sod(n) for n = 28919983 and 28920010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451844 + ... + 451907.

It is an arithmetic number, because the mean of its divisors is an integer number (4744698).

Almost surely, 2^28920032 is an apocalyptic number.

It is an amenable number.

28920032 is a deficient number, since it is larger than the sum of its proper divisors (28016344).

28920032 is an equidigital number, since it uses as much as digits as its factorization.

28920032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903761 (or 903753 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 28920032 is about 5377.7348391307. The cubic root of 28920032 is about 306.9490237097.

The spelling of 28920032 in words is "twenty-eight million, nine hundred twenty thousand, thirty-two".