28975761 has 6 divisors (see below), whose sum is σ = 41853890. Its totient is φ = 19317168.

The previous prime is 28975757. The next prime is 28975777. The reversal of 28975761 is 16757982.

It can be written as a sum of positive squares in only one way, i.e., 27499536 + 1476225 = 5244^2 + 1215^2 .

It is not a de Polignac number, because 28975761 - 2² = 28975757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28975781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1609756 + ... + 1609773.

Almost surely, 2^28975761 is an apocalyptic number.

It is an amenable number.

28975761 is a deficient number, since it is larger than the sum of its proper divisors (12878129).

28975761 is a wasteful number, since it uses less digits than its factorization.

28975761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219535 (or 3219532 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28975761 is about 5382.9138020221. The cubic root of 28975761 is about 307.1460611374.

The spelling of 28975761 in words is "twenty-eight million, nine hundred seventy-five thousand, seven hundred sixty-one".