28470005 has 8 divisors (see below), whose sum is σ = 34193112. Its totient is φ = 22756608.

The previous prime is 28469989. The next prime is 28470007. The reversal of 28470005 is 50007482.

It can be written as a sum of positive squares in 4 ways, for example, as 7300804 + 21169201 = 2702^2 + 4601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28470005 - 2⁴ = 28469989 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 (28470007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8537 + ... + 11393.

It is an arithmetic number, because the mean of its divisors is an integer number (4274139).

Almost surely, 2^28470005 is an apocalyptic number.

It is an amenable number.

28470005 is a deficient number, since it is larger than the sum of its proper divisors (5723107).

28470005 is a wasteful number, since it uses less digits than its factorization.

28470005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 28470005 is about 5335.7290973212. The cubic root of 28470005 is about 305.3485400101.

Adding to 28470005 its reverse (50007482), we get a palindrome (78477487).

The spelling of 28470005 in words is "twenty-eight million, four hundred seventy thousand, five".