28324873 has 16 divisors (see below), whose sum is σ = 30799440. Its totient is φ = 25952256.

The previous prime is 28324867. The next prime is 28324883. The reversal of 28324873 is 37842382.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 898704 + 27426169 = 948^2 + 5237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28324873 is a prime.

It is a super-2 number, since 2×28324873² = 1604596860932258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28324883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146665 + ... + 146857.

It is an arithmetic number, because the mean of its divisors is an integer number (1924965).

Almost surely, 2^28324873 is an apocalyptic number.

It is an amenable number.

28324873 is a deficient number, since it is larger than the sum of its proper divisors (2474567).

28324873 is a wasteful number, since it uses less digits than its factorization.

28324873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 64512, while the sum is 37.

The square root of 28324873 is about 5322.1117049532. Note that the first 3 decimals coincide. The cubic root of 28324873 is about 304.8287957917.

The spelling of 28324873 in words is "twenty-eight million, three hundred twenty-four thousand, eight hundred seventy-three".