28882649 has 4 divisors (see below), whose sum is σ = 28901136. Its totient is φ = 28864164.

The previous prime is 28882621. The next prime is 28882657. The reversal of 28882649 is 94628882.

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 28882649 - 2²⁰ = 27834073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28882699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6659 + ... + 10104.

It is an arithmetic number, because the mean of its divisors is an integer number (7225284).

Almost surely, 2^28882649 is an apocalyptic number.

It is an amenable number.

28882649 is a deficient number, since it is larger than the sum of its proper divisors (18487).

28882649 is a wasteful number, since it uses less digits than its factorization.

28882649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18486.

The product of its digits is 442368, while the sum is 47.

The square root of 28882649 is about 5374.2579952957. The cubic root of 28882649 is about 306.8167091593.

The spelling of 28882649 in words is "twenty-eight million, eight hundred eighty-two thousand, six hundred forty-nine".