28660458657 has 8 divisors (see below), whose sum is σ = 39145992480. Its totient is φ = 18640948640.

The previous prime is 28660458611. The next prime is 28660458703. The reversal of 28660458657 is 75685406682.

It is an interprime number because it is at equal distance from previous prime (28660458611) and next prime (28660458703).

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 28660458657 - 2⁷ = 28660458529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28660458597 and 28660458606.

It is not an unprimeable number, because it can be changed into a prime (28660458157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116505807 + ... + 116506052.

It is an arithmetic number, because the mean of its divisors is an integer number (4893249060).

Almost surely, 2^28660458657 is an apocalyptic number.

It is an amenable number.

28660458657 is a deficient number, since it is larger than the sum of its proper divisors (10485533823).

28660458657 is a wasteful number, since it uses less digits than its factorization.

28660458657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233011903.

The product of its (nonzero) digits is 19353600, while the sum is 57.

The spelling of 28660458657 in words is "twenty-eight billion, six hundred sixty million, four hundred fifty-eight thousand, six hundred fifty-seven".