28363640579 has 4 divisors (see below), whose sum is σ = 28485373176. Its totient is φ = 28241907984.

The previous prime is 28363640561. The next prime is 28363640593. The reversal of 28363640579 is 97504636382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28363640579 - 2¹⁶ = 28363575043 is a prime.

It is a super-2 number, since 2×28363640579² (a number of 22 digits) contains 22 as substring.

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 28363640579.

It is not an unprimeable number, because it can be changed into a prime (28363640519) 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, 60865949 + ... + 60866414.

It is an arithmetic number, because the mean of its divisors is an integer number (7121343294).

Almost surely, 2^28363640579 is an apocalyptic number.

28363640579 is a deficient number, since it is larger than the sum of its proper divisors (121732597).

28363640579 is a wasteful number, since it uses less digits than its factorization.

28363640579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121732596.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 28363640579 in words is "twenty-eight billion, three hundred sixty-three million, six hundred forty thousand, five hundred seventy-nine".