28602068221 has 8 divisors (see below), whose sum is σ = 29331840384. Its totient is φ = 27877346880.

The previous prime is 28602068197. The next prime is 28602068233. The reversal of 28602068221 is 12286020682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28602068221 - 2⁵ = 28602068189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28602068921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251235 + ... + 1273888.

It is an arithmetic number, because the mean of its divisors is an integer number (3666480048).

Almost surely, 2^28602068221 is an apocalyptic number.

It is an amenable number.

28602068221 is a deficient number, since it is larger than the sum of its proper divisors (729772163).

28602068221 is a wasteful number, since it uses less digits than its factorization.

28602068221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525411.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 28602068221 in words is "twenty-eight billion, six hundred two million, sixty-eight thousand, two hundred twenty-one".