28292657 has 2 divisors, whose sum is σ = 28292658. Its totient is φ = 28292656.

The previous prime is 28292651. The next prime is 28292681. The reversal of 28292657 is 75629282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27363361 + 929296 = 5231^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 28292657 - 2⁸ = 28292401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28292651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146328 + 14146329.

It is an arithmetic number, because the mean of its divisors is an integer number (14146329).

Almost surely, 2^28292657 is an apocalyptic number.

It is an amenable number.

28292657 is a deficient number, since it is larger than the sum of its proper divisors (1).

28292657 is an equidigital number, since it uses as much as digits as its factorization.

28292657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 28292657 is about 5319.0842256915. The cubic root of 28292657 is about 304.7131837407.

The spelling of 28292657 in words is "twenty-eight million, two hundred ninety-two thousand, six hundred fifty-seven".