28475005 has 16 divisors (see below), whose sum is σ = 36978480. Its totient is φ = 20924928.

The previous prime is 28474981. The next prime is 28475009. The reversal of 28475005 is 50057482.

It can be written as a sum of positive squares in 8 ways, for example, as 1153476 + 27321529 = 1074^2 + 5227^2 .

It is a cyclic number.

It is not a de Polignac number, because 28475005 - 2⁵ = 28474973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475009) 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 15 ways as a sum of consecutive naturals, for example, 13929 + ... + 15841.

It is an arithmetic number, because the mean of its divisors is an integer number (2311155).

Almost surely, 2^28475005 is an apocalyptic number.

It is an amenable number.

28475005 is a deficient number, since it is larger than the sum of its proper divisors (8503475).

28475005 is a wasteful number, since it uses less digits than its factorization.

28475005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28475005 is about 5336.1976162807. The cubic root of 28475005 is about 305.3664144167.

The spelling of 28475005 in words is "twenty-eight million, four hundred seventy-five thousand, five".