28485928 has 8 divisors (see below), whose sum is σ = 53411130. Its totient is φ = 14242960.

The previous prime is 28485911. The next prime is 28485953. The reversal of 28485928 is 82958482.

It can be written as a sum of positive squares in only one way, i.e., 19377604 + 9108324 = 4402^2 + 3018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28485928² = 1622896188042368, which contains 22 as substring.

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, 1780363 + ... + 1780378.

Almost surely, 2^28485928 is an apocalyptic number.

It is an amenable number.

28485928 is a deficient number, since it is larger than the sum of its proper divisors (24925202).

28485928 is a wasteful number, since it uses less digits than its factorization.

28485928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560747 (or 3560743 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 28485928 is about 5337.2209997339. The cubic root of 28485928 is about 305.4054555680.

The spelling of 28485928 in words is "twenty-eight million, four hundred eighty-five thousand, nine hundred twenty-eight".