28677449 has 4 divisors (see below), whose sum is σ = 29602560. Its totient is φ = 27752340.

The previous prime is 28677437. The next prime is 28677457. The reversal of 28677449 is 94477682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28677449 - 2⁸ = 28677193 is a prime.

It is a super-2 number, since 2×28677449² = 1644792162295202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28677499) 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 in 3 ways as a sum of consecutive naturals, for example, 462509 + ... + 462570.

It is an arithmetic number, because the mean of its divisors is an integer number (7400640).

Almost surely, 2^28677449 is an apocalyptic number.

It is an amenable number.

28677449 is a deficient number, since it is larger than the sum of its proper divisors (925111).

28677449 is an equidigital number, since it uses as much as digits as its factorization.

28677449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925110.

The product of its digits is 677376, while the sum is 47.

The square root of 28677449 is about 5355.1329582000. The cubic root of 28677449 is about 306.0883770817.

The spelling of 28677449 in words is "twenty-eight million, six hundred seventy-seven thousand, four hundred forty-nine".