28690597646821 has 8 divisors (see below), whose sum is σ = 31298872881024. Its totient is φ = 26082328926720.

The previous prime is 28690597646791. The next prime is 28690597646899. The reversal of 28690597646821 is 12864679509682.

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

It is not a de Polignac number, because 28690597646821 - 2¹⁵ = 28690597614053 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 (28690597641821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14691556 + ... + 16529458.

It is an arithmetic number, because the mean of its divisors is an integer number (3912359110128).

Almost surely, 2^{28690597646821} is an apocalyptic number.

It is an amenable number.

28690597646821 is a deficient number, since it is larger than the sum of its proper divisors (2608275234203).

28690597646821 is a wasteful number, since it uses less digits than its factorization.

28690597646821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257051.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 28690597646821 in words is "twenty-eight trillion, six hundred ninety billion, five hundred ninety-seven million, six hundred forty-six thousand, eight hundred twenty-one".