28744873 has 2 divisors, whose sum is σ = 28744874. Its totient is φ = 28744872.

The previous prime is 28744831. The next prime is 28744879. The reversal of 28744873 is 37844782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 2663424 = 5107^2 + 1632^2 .

It is a cyclic number.

It is not a de Polignac number, because 28744873 - 2⁹ = 28744361 is a prime.

It is a super-2 number, since 2×28744873² = 1652535447572258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28744879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14372436 + 14372437.

It is an arithmetic number, because the mean of its divisors is an integer number (14372437).

Almost surely, 2^28744873 is an apocalyptic number.

It is an amenable number.

28744873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28744873 is an equidigital number, since it uses as much as digits as its factorization.

28744873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 43.

The square root of 28744873 is about 5361.4245308500. The cubic root of 28744873 is about 306.3280723902.

Subtracting 28744873 from its reverse (37844782), we obtain a palindrome (9099909).

The spelling of 28744873 in words is "twenty-eight million, seven hundred forty-four thousand, eight hundred seventy-three".