28544749 has 2 divisors, whose sum is σ = 28544750. Its totient is φ = 28544748.

The previous prime is 28544743. The next prime is 28544773. The reversal of 28544749 is 94744582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17489124 + 11055625 = 4182^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 28544749 - 2¹⁷ = 28413677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28544743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272374 + 14272375.

It is an arithmetic number, because the mean of its divisors is an integer number (14272375).

Almost surely, 2^28544749 is an apocalyptic number.

It is an amenable number.

28544749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28544749 is an equidigital number, since it uses as much as digits as its factorization.

28544749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 43.

The square root of 28544749 is about 5342.7286099895. The cubic root of 28544749 is about 305.6155230744.

The spelling of 28544749 in words is "twenty-eight million, five hundred forty-four thousand, seven hundred forty-nine".