28849537 has 2 divisors, whose sum is σ = 28849538. Its totient is φ = 28849536.

The previous prime is 28849531. The next prime is 28849547. The reversal of 28849537 is 73594882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20034576 + 8814961 = 4476^2 + 2969^2 .

It is a cyclic number.

It is not a de Polignac number, because 28849537 - 2¹⁹ = 28325249 is a prime.

It is a super-2 number, since 2×28849537² = 1664591570228738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28849531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14424768 + 14424769.

It is an arithmetic number, because the mean of its divisors is an integer number (14424769).

Almost surely, 2^28849537 is an apocalyptic number.

It is an amenable number.

28849537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28849537 is an equidigital number, since it uses as much as digits as its factorization.

28849537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 28849537 is about 5371.1765005444. The cubic root of 28849537 is about 306.6994161360.

It can be divided in two parts, 2884 and 9537, that added together give a palindrome (12421).

The spelling of 28849537 in words is "twenty-eight million, eight hundred forty-nine thousand, five hundred thirty-seven".