28447577 has 2 divisors, whose sum is σ = 28447578. Its totient is φ = 28447576.

The previous prime is 28447571. The next prime is 28447603. The reversal of 28447577 is 77574482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27709696 + 737881 = 5264^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 28447577 - 2¹⁶ = 28382041 is a prime.

It is not a weakly prime, because it can be changed into another prime (28447571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14223788 + 14223789.

It is an arithmetic number, because the mean of its divisors is an integer number (14223789).

Almost surely, 2^28447577 is an apocalyptic number.

It is an amenable number.

28447577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28447577 is an equidigital number, since it uses as much as digits as its factorization.

28447577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 44.

The square root of 28447577 is about 5333.6270023315. The cubic root of 28447577 is about 305.2683368142.

The spelling of 28447577 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred seventy-seven".