28953605775 has 48 divisors (see below), whose sum is σ = 50770321920. Its totient is φ = 14528342400.

The previous prime is 28953605749. The next prime is 28953605803. The reversal of 28953605775 is 57750635982.

It is a happy number.

It is not a de Polignac number, because 28953605775 - 2⁷ = 28953605647 is a prime.

It is a super-2 number, since 2×28953605775² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32355 + ... + 242804.

It is an arithmetic number, because the mean of its divisors is an integer number (1057715040).

Almost surely, 2^28953605775 is an apocalyptic number.

28953605775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28953605775 is a deficient number, since it is larger than the sum of its proper divisors (21816716145).

28953605775 is a wasteful number, since it uses less digits than its factorization.

28953605775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275256 (or 275251 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 57.

The spelling of 28953605775 in words is "twenty-eight billion, nine hundred fifty-three million, six hundred five thousand, seven hundred seventy-five".