28795720489 has 8 divisors (see below), whose sum is σ = 29186418560. Its totient is φ = 28405677456.

The previous prime is 28795720483. The next prime is 28795720501. The reversal of 28795720489 is 98402759782.

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

It is a cyclic number.

It is not a de Polignac number, because 28795720489 - 2⁷ = 28795720361 is a prime.

It is a super-2 number, since 2×28795720489² (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 (28795720483) 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, 74919 + ... + 251404.

It is an arithmetic number, because the mean of its divisors is an integer number (3648302320).

Almost surely, 2^28795720489 is an apocalyptic number.

It is an amenable number.

28795720489 is a deficient number, since it is larger than the sum of its proper divisors (390698071).

28795720489 is a wasteful number, since it uses less digits than its factorization.

28795720489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327519.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 28795720489 in words is "twenty-eight billion, seven hundred ninety-five million, seven hundred twenty thousand, four hundred eighty-nine".