28023315 has 32 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 13956096.

The previous prime is 28023311. The next prime is 28023337. The reversal of 28023315 is 51332082.

It is not a de Polignac number, because 28023315 - 2² = 28023311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28023311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13891 + ... + 15779.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^28023315 is an apocalyptic number.

28023315 is a deficient number, since it is larger than the sum of its proper divisors (19876845).

28023315 is a wasteful number, since it uses less digits than its factorization.

28023315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 28023315 is about 5293.7052241318. The cubic root of 28023315 is about 303.7431572236.

Adding to 28023315 its reverse (51332082), we get a palindrome (79355397).

The spelling of 28023315 in words is "twenty-eight million, twenty-three thousand, three hundred fifteen".