28083457 has 2 divisors, whose sum is σ = 28083458. Its totient is φ = 28083456.

The previous prime is 28083449. The next prime is 28083479. The reversal of 28083457 is 75438082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 3837681 = 4924^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 28083457 - 2³ = 28083449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28083857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14041728 + 14041729.

It is an arithmetic number, because the mean of its divisors is an integer number (14041729).

Almost surely, 2^28083457 is an apocalyptic number.

It is an amenable number.

28083457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28083457 is an equidigital number, since it uses as much as digits as its factorization.

28083457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28083457 is about 5299.3826999001. The cubic root of 28083457 is about 303.9602938965.

The spelling of 28083457 in words is "twenty-eight million, eighty-three thousand, four hundred fifty-seven".