28221352 has 16 divisors (see below), whose sum is σ = 53812800. Its totient is φ = 13871280.

The previous prime is 28221337. The next prime is 28221353. The reversal of 28221352 is 25312282.

It is not an unprimeable number, because it can be changed into a prime (28221353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29424 + ... + 30367.

It is an arithmetic number, because the mean of its divisors is an integer number (3363300).

Almost surely, 2^28221352 is an apocalyptic number.

It is an amenable number.

28221352 is a deficient number, since it is larger than the sum of its proper divisors (25591448).

28221352 is a wasteful number, since it uses less digits than its factorization.

28221352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59856 (or 59852 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 28221352 is about 5312.3772456406. The cubic root of 28221352 is about 304.4569823731.

The spelling of 28221352 in words is "twenty-eight million, two hundred twenty-one thousand, three hundred fifty-two".