28647201 has 16 divisors (see below), whose sum is σ = 42174720. Its totient is φ = 17151120.

The previous prime is 28647197. The next prime is 28647209. The reversal of 28647201 is 10274682.

It is not a de Polignac number, because 28647201 - 2² = 28647197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28647209) 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 15 ways as a sum of consecutive naturals, for example, 2491 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (2635920).

Almost surely, 2^28647201 is an apocalyptic number.

It is an amenable number.

28647201 is a deficient number, since it is larger than the sum of its proper divisors (13527519).

28647201 is a wasteful number, since it uses less digits than its factorization.

28647201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28647201 is about 5352.3080068322. The cubic root of 28647201 is about 305.9807220116.

The spelling of 28647201 in words is "twenty-eight million, six hundred forty-seven thousand, two hundred one".