28977749 has 2 divisors, whose sum is σ = 28977750. Its totient is φ = 28977748.

The previous prime is 28977737. The next prime is 28977761. The reversal of 28977749 is 94777982.

It is a balanced prime because it is at equal distance from previous prime (28977737) and next prime (28977761).

It can be written as a sum of positive squares in only one way, i.e., 28462225 + 515524 = 5335^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 28977749 - 2⁴ = 28977733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28977749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28977719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14488874 + 14488875.

It is an arithmetic number, because the mean of its divisors is an integer number (14488875).

Almost surely, 2^28977749 is an apocalyptic number.

It is an amenable number.

28977749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28977749 is an equidigital number, since it uses as much as digits as its factorization.

28977749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 53.

The square root of 28977749 is about 5383.0984572085. The cubic root of 28977749 is about 307.1530853119.

The spelling of 28977749 in words is "twenty-eight million, nine hundred seventy-seven thousand, seven hundred forty-nine".