28481205 has 32 divisors (see below), whose sum is σ = 49068288. Its totient is φ = 14054400.

The previous prime is 28481191. The next prime is 28481207. The reversal of 28481205 is 50218482.

It is not a de Polignac number, because 28481205 - 2⁷ = 28481077 is a prime.

It is a super-2 number, since 2×28481205² = 1622358076504050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14640 + ... + 16470.

It is an arithmetic number, because the mean of its divisors is an integer number (1533384).

Almost surely, 2^28481205 is an apocalyptic number.

It is an amenable number.

28481205 is a deficient number, since it is larger than the sum of its proper divisors (20587083).

28481205 is a wasteful number, since it uses less digits than its factorization.

28481205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28481205 is about 5336.7785226670. The cubic root of 28481205 is about 305.3885757751.

Adding to 28481205 its reverse (50218482), we get a palindrome (78699687).

The spelling of 28481205 in words is "twenty-eight million, four hundred eighty-one thousand, two hundred five".