28555983 has 10 divisors (see below), whose sum is σ = 42657824. Its totient is φ = 19037268.

The previous prime is 28555979. The next prime is 28556023. The reversal of 28555983 is 38955582.

28555983 is a `hidden beast` number, since 2 + 8 + 55 + 598 + 3 = 666.

It is not a de Polignac number, because 28555983 - 2² = 28555979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 176191 + ... + 176352.

Almost surely, 2^28555983 is an apocalyptic number.

28555983 is a deficient number, since it is larger than the sum of its proper divisors (14101841).

28555983 is an equidigital number, since it uses as much as digits as its factorization.

28555983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352555 (or 352546 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 28555983 is about 5343.7798420219. The cubic root of 28555983 is about 305.6556102428.

The spelling of 28555983 in words is "twenty-eight million, five hundred fifty-five thousand, nine hundred eighty-three".