28091950 has 12 divisors (see below), whose sum is σ = 52251120. Its totient is φ = 11236760.

The previous prime is 28091941. The next prime is 28091953. The reversal of 28091950 is 5919082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28091953) 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 5 ways as a sum of consecutive naturals, for example, 280870 + ... + 280969.

It is an arithmetic number, because the mean of its divisors is an integer number (4354260).

Almost surely, 2^28091950 is an apocalyptic number.

28091950 is a deficient number, since it is larger than the sum of its proper divisors (24159170).

28091950 is a wasteful number, since it uses less digits than its factorization.

28091950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561851 (or 561846 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 28091950 is about 5300.1839590716. The cubic root of 28091950 is about 303.9909320356.

The spelling of 28091950 in words is "twenty-eight million, ninety-one thousand, nine hundred fifty".