28821196 has 24 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 13603200.

The previous prime is 28821181. The next prime is 28821197. The reversal of 28821196 is 69112882.

It is a super-2 number, since 2×28821196² = 1661322677740832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28821197) 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, 2250 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (2222640).

Almost surely, 2^28821196 is an apocalyptic number.

It is an amenable number.

28821196 is a deficient number, since it is larger than the sum of its proper divisors (24522164).

28821196 is a wasteful number, since it uses less digits than its factorization.

28821196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745 (or 5743 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 28821196 is about 5368.5376034820. The cubic root of 28821196 is about 306.5989521779.

The spelling of 28821196 in words is "twenty-eight million, eight hundred twenty-one thousand, one hundred ninety-six".