28639602201 has 16 divisors (see below), whose sum is σ = 43860608000. Its totient is φ = 16283245968.

The previous prime is 28639602197. The next prime is 28639602221. The reversal of 28639602201 is 10220693682.

It is a happy number.

It is not a de Polignac number, because 28639602201 - 2² = 28639602197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28639602201.

It is not an unprimeable number, because it can be changed into a prime (28639602221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3422431 + ... + 3430788.

It is an arithmetic number, because the mean of its divisors is an integer number (2741288000).

Almost surely, 2^28639602201 is an apocalyptic number.

28639602201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28639602201 is a deficient number, since it is larger than the sum of its proper divisors (15221005799).

28639602201 is a wasteful number, since it uses less digits than its factorization.

28639602201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853428.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 28639602201 in words is "twenty-eight billion, six hundred thirty-nine million, six hundred two thousand, two hundred one".