28103720617 has 8 divisors (see below), whose sum is σ = 32126304896. Its totient is φ = 24083078112.

The previous prime is 28103720537. The next prime is 28103720651. The reversal of 28103720617 is 71602730182.

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 28103720617 - 2¹⁵ = 28103687849 is a prime.

It is a super-2 number, since 2×28103720617² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28103720917) 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, 454293 + ... + 512434.

It is an arithmetic number, because the mean of its divisors is an integer number (4015788112).

Almost surely, 2^28103720617 is an apocalyptic number.

It is an amenable number.

28103720617 is a deficient number, since it is larger than the sum of its proper divisors (4022584279).

28103720617 is an equidigital number, since it uses as much as digits as its factorization.

28103720617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970887.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 28103720617 in words is "twenty-eight billion, one hundred three million, seven hundred twenty thousand, six hundred seventeen".