28392296657 has 16 divisors (see below), whose sum is σ = 30220861440. Its totient is φ = 26598550608.

The previous prime is 28392296651. The next prime is 28392296743. The reversal of 28392296657 is 75669229382.

It is a cyclic number.

It is not a de Polignac number, because 28392296657 - 2¹² = 28392292561 is a prime.

It is a super-2 number, since 2×28392296657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28392296596 and 28392296605.

It is not an unprimeable number, because it can be changed into a prime (28392296651) 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 15 ways as a sum of consecutive naturals, for example, 721628 + ... + 759954.

It is an arithmetic number, because the mean of its divisors is an integer number (1888803840).

Almost surely, 2^28392296657 is an apocalyptic number.

It is an amenable number.

28392296657 is a deficient number, since it is larger than the sum of its proper divisors (1828564783).

28392296657 is a wasteful number, since it uses less digits than its factorization.

28392296657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38780.

The product of its digits is 19595520, while the sum is 59.

The spelling of 28392296657 in words is "twenty-eight billion, three hundred ninety-two million, two hundred ninety-six thousand, six hundred fifty-seven".