28821595 has 12 divisors (see below), whose sum is σ = 38016720. Its totient is φ = 20960720.

The previous prime is 28821593. The next prime is 28821601. The reversal of 28821595 is 59512882.

It is not a de Polignac number, because 28821595 - 2¹ = 28821593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28821593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23215 + ... + 24424.

It is an arithmetic number, because the mean of its divisors is an integer number (3168060).

Almost surely, 2^28821595 is an apocalyptic number.

28821595 is a deficient number, since it is larger than the sum of its proper divisors (9195125).

28821595 is a wasteful number, since it uses less digits than its factorization.

28821595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47666 (or 47655 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 28821595 is about 5368.5747643113. The cubic root of 28821595 is about 306.6003670211.

The spelling of 28821595 in words is "twenty-eight million, eight hundred twenty-one thousand, five hundred ninety-five".