28332801 has 16 divisors (see below), whose sum is σ = 47971200. Its totient is φ = 16190064.

The previous prime is 28332751. The next prime is 28332847. The reversal of 28332801 is 10823382.

It is not a de Polignac number, because 28332801 - 2⁷ = 28332673 is a prime.

It is a super-2 number, since 2×28332801² = 1605495225011202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28332001) 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, 74766 + ... + 75143.

It is an arithmetic number, because the mean of its divisors is an integer number (2998200).

Almost surely, 2^28332801 is an apocalyptic number.

28332801 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28332801 is a deficient number, since it is larger than the sum of its proper divisors (19638399).

28332801 is a wasteful number, since it uses less digits than its factorization.

28332801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149925 (or 149919 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28332801 is about 5322.8564699793. The cubic root of 28332801 is about 304.8572331920.

The spelling of 28332801 in words is "twenty-eight million, three hundred thirty-two thousand, eight hundred one".