28744949 has 2 divisors, whose sum is σ = 28744950. Its totient is φ = 28744948.

The previous prime is 28744939. The next prime is 28744951. The reversal of 28744949 is 94944782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24186724 + 4558225 = 4918^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 28744949 - 2⁸ = 28744693 is a prime.

Together with 28744951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28744939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14372474 + 14372475.

It is an arithmetic number, because the mean of its divisors is an integer number (14372475).

Almost surely, 2^28744949 is an apocalyptic number.

It is an amenable number.

28744949 is a deficient number, since it is larger than the sum of its proper divisors (1).

28744949 is an equidigital number, since it uses as much as digits as its factorization.

28744949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 28744949 is about 5361.4316185138. The cubic root of 28744949 is about 306.3283423619.

The spelling of 28744949 in words is "twenty-eight million, seven hundred forty-four thousand, nine hundred forty-nine".