28946963257 has 4 divisors (see below), whose sum is σ = 29009484160. Its totient is φ = 28884442356.

The previous prime is 28946963249. The next prime is 28946963261. The reversal of 28946963257 is 75236964982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28946963257 - 2³ = 28946963249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28946963195 and 28946963204.

It is not an unprimeable number, because it can be changed into a prime (28946963207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31259757 + ... + 31260682.

It is an arithmetic number, because the mean of its divisors is an integer number (7252371040).

Almost surely, 2^28946963257 is an apocalyptic number.

It is an amenable number.

28946963257 is a deficient number, since it is larger than the sum of its proper divisors (62520903).

28946963257 is an equidigital number, since it uses as much as digits as its factorization.

28946963257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62520902.

The product of its digits is 39191040, while the sum is 61.

The spelling of 28946963257 in words is "twenty-eight billion, nine hundred forty-six million, nine hundred sixty-three thousand, two hundred fifty-seven".