28975081 has 2 divisors, whose sum is σ = 28975082. Its totient is φ = 28975080.

The previous prime is 28974989. The next prime is 28975091. The reversal of 28975081 is 18057982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 6969600 = 4691^2 + 2640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28975081 is a prime.

It is a super-2 number, since 2×28975081² = 1679110637913122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28975091) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14487540 + 14487541.

It is an arithmetic number, because the mean of its divisors is an integer number (14487541).

Almost surely, 2^28975081 is an apocalyptic number.

It is an amenable number.

28975081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28975081 is an equidigital number, since it uses as much as digits as its factorization.

28975081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 28975081 is about 5382.8506388344. The cubic root of 28975081 is about 307.1436584285.

The spelling of 28975081 in words is "twenty-eight million, nine hundred seventy-five thousand, eighty-one".