28280677957 has 24 divisors (see below), whose sum is σ = 33733541184. Its totient is φ = 23632342272.

The previous prime is 28280677951. The next prime is 28280677969. The reversal of 28280677957 is 75977608282.

It is not a de Polignac number, because 28280677957 - 2⁷ = 28280677829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28280677895 and 28280677904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280677951) 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 23 ways as a sum of consecutive naturals, for example, 274048 + ... + 362854.

It is an arithmetic number, because the mean of its divisors is an integer number (1405564216).

Almost surely, 2^28280677957 is an apocalyptic number.

It is an amenable number.

28280677957 is a deficient number, since it is larger than the sum of its proper divisors (5452863227).

28280677957 is an equidigital number, since it uses as much as digits as its factorization.

28280677957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88985 (or 88978 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 28280677957 in words is "twenty-eight billion, two hundred eighty million, six hundred seventy-seven thousand, nine hundred fifty-seven".