28723097617 has 8 divisors (see below), whose sum is σ = 29236147200. Its totient is φ = 28210922064.

The previous prime is 28723097593. The next prime is 28723097629. The reversal of 28723097617 is 71679032782.

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 28723097617 - 2⁷ = 28723097489 is a prime.

It is a super-2 number, since 2×28723097617² (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 (28723097657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152017 + ... + 283822.

It is an arithmetic number, because the mean of its divisors is an integer number (3654518400).

Almost surely, 2^28723097617 is an apocalyptic number.

It is an amenable number.

28723097617 is a deficient number, since it is larger than the sum of its proper divisors (513049583).

28723097617 is a wasteful number, since it uses less digits than its factorization.

28723097617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437015.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 28723097617 in words is "twenty-eight billion, seven hundred twenty-three million, ninety-seven thousand, six hundred seventeen".