28022949 has 16 divisors (see below), whose sum is σ = 42639040. Its totient is φ = 18176400.

The previous prime is 28022941. The next prime is 28022999. The reversal of 28022949 is 94922082.

It is not a de Polignac number, because 28022949 - 2³ = 28022941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022941) 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 15 ways as a sum of consecutive naturals, for example, 13027 + ... + 15024.

It is an arithmetic number, because the mean of its divisors is an integer number (2664940).

Almost surely, 2^28022949 is an apocalyptic number.

It is an amenable number.

28022949 is a deficient number, since it is larger than the sum of its proper divisors (14616091).

28022949 is a wasteful number, since it uses less digits than its factorization.

28022949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28097 (or 28091 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28022949 is about 5293.6706546592. The cubic root of 28022949 is about 303.7418348666.

The spelling of 28022949 in words is "twenty-eight million, twenty-two thousand, nine hundred forty-nine".