28470457 has 2 divisors, whose sum is σ = 28470458. Its totient is φ = 28470456.

The previous prime is 28470451. The next prime is 28470499. The reversal of 28470457 is 75407482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26327161 + 2143296 = 5131^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 28470457 - 2¹¹ = 28468409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28470451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14235228 + 14235229.

It is an arithmetic number, because the mean of its divisors is an integer number (14235229).

Almost surely, 2^28470457 is an apocalyptic number.

It is an amenable number.

28470457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28470457 is an equidigital number, since it uses as much as digits as its factorization.

28470457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 28470457 is about 5335.7714531265. The cubic root of 28470457 is about 305.3501559425.

The spelling of 28470457 in words is "twenty-eight million, four hundred seventy thousand, four hundred fifty-seven".