28680497 has 2 divisors, whose sum is σ = 28680498. Its totient is φ = 28680496.

The previous prime is 28680493. The next prime is 28680541. The reversal of 28680497 is 79408682.

It is an a-pointer prime, because the next prime (28680541) can be obtained adding 28680497 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15713296 + 12967201 = 3964^2 + 3601^2 .

It is a cyclic number.

It is not a de Polignac number, because 28680497 - 2² = 28680493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28680493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14340248 + 14340249.

It is an arithmetic number, because the mean of its divisors is an integer number (14340249).

Almost surely, 2^28680497 is an apocalyptic number.

It is an amenable number.

28680497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28680497 is an equidigital number, since it uses as much as digits as its factorization.

28680497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 28680497 is about 5355.4175374101. The cubic root of 28680497 is about 306.0992209602.

The spelling of 28680497 in words is "twenty-eight million, six hundred eighty thousand, four hundred ninety-seven".