28046657 has 2 divisors, whose sum is σ = 28046658. Its totient is φ = 28046656.

The previous prime is 28046609. The next prime is 28046663. The reversal of 28046657 is 75664082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24364096 + 3682561 = 4936^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 28046657 - 2¹² = 28042561 is a prime.

It is a super-2 number, since 2×28046657² = 1573229937751298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28046657.

It is not a weakly prime, because it can be changed into another prime (28016657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14023328 + 14023329.

It is an arithmetic number, because the mean of its divisors is an integer number (14023329).

Almost surely, 2^28046657 is an apocalyptic number.

It is an amenable number.

28046657 is a deficient number, since it is larger than the sum of its proper divisors (1).

28046657 is an equidigital number, since it uses as much as digits as its factorization.

28046657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 28046657 is about 5295.9094591958. The cubic root of 28046657 is about 303.8274680336.

The spelling of 28046657 in words is "twenty-eight million, forty-six thousand, six hundred fifty-seven".