28600001321 has 4 divisors (see below), whose sum is σ = 28728252672. Its totient is φ = 28471749972.

The previous prime is 28600001303. The next prime is 28600001329. The reversal of 28600001321 is 12310000682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28600001321 - 2⁶ = 28600001257 is a prime.

It is a super-2 number, since 2×28600001321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28600001329) 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, 64125341 + ... + 64125786.

It is an arithmetic number, because the mean of its divisors is an integer number (7182063168).

Almost surely, 2^28600001321 is an apocalyptic number.

It is an amenable number.

28600001321 is a deficient number, since it is larger than the sum of its proper divisors (128251351).

28600001321 is a wasteful number, since it uses less digits than its factorization.

28600001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128251350.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 28600001321 in words is "twenty-eight billion, six hundred million, one thousand, three hundred twenty-one".