28895220757 has 8 divisors (see below), whose sum is σ = 31780014336. Its totient is φ = 26105010672.

The previous prime is 28895220751. The next prime is 28895220791. The reversal of 28895220757 is 75702259882.

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

It is a de Polignac number, because none of the positive numbers 2^k-28895220757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28895220698 and 28895220707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28895220751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23645233 + ... + 23646454.

It is an arithmetic number, because the mean of its divisors is an integer number (3972501792).

Almost surely, 2^28895220757 is an apocalyptic number.

It is an amenable number.

28895220757 is a deficient number, since it is larger than the sum of its proper divisors (2884793579).

28895220757 is a wasteful number, since it uses less digits than its factorization.

28895220757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47291747.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 28895220757 in words is "twenty-eight billion, eight hundred ninety-five million, two hundred twenty thousand, seven hundred fifty-seven".