28415249 has 2 divisors, whose sum is σ = 28415250. Its totient is φ = 28415248.

The previous prime is 28415243. The next prime is 28415287. The reversal of 28415249 is 94251482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 3214849 = 5020^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 28415249 - 2⁸ = 28414993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28415243) 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, 14207624 + 14207625.

It is an arithmetic number, because the mean of its divisors is an integer number (14207625).

Almost surely, 2^28415249 is an apocalyptic number.

It is an amenable number.

28415249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28415249 is an equidigital number, since it uses as much as digits as its factorization.

28415249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 28415249 is about 5330.5955577215. The cubic root of 28415249 is about 305.1526567167.

The spelling of 28415249 in words is "twenty-eight million, four hundred fifteen thousand, two hundred forty-nine".