28912653775 has 24 divisors (see below), whose sum is σ = 36894451104. Its totient is φ = 22459881600.

The previous prime is 28912653773. The next prime is 28912653779. The reversal of 28912653775 is 57735621982.

It is not a de Polignac number, because 28912653775 - 2¹ = 28912653773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28912653773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434205 + ... + 496345.

It is an arithmetic number, because the mean of its divisors is an integer number (1537268796).

Almost surely, 2^28912653775 is an apocalyptic number.

28912653775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28912653775 is a deficient number, since it is larger than the sum of its proper divisors (7981797329).

28912653775 is a wasteful number, since it uses less digits than its factorization.

28912653775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62691 (or 62686 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 55.

The spelling of 28912653775 in words is "twenty-eight billion, nine hundred twelve million, six hundred fifty-three thousand, seven hundred seventy-five".