28387132 has 6 divisors (see below), whose sum is σ = 49677488. Its totient is φ = 14193564.

The previous prime is 28387111. The next prime is 28387133. The reversal of 28387132 is 23178382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28387133) 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 as a sum of consecutive naturals, namely, 3548388 + ... + 3548395.

Almost surely, 2^28387132 is an apocalyptic number.

It is an amenable number.

28387132 is a deficient number, since it is larger than the sum of its proper divisors (21290356).

28387132 is a wasteful number, since it uses less digits than its factorization.

28387132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096787 (or 7096785 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 28387132 is about 5327.9575824137. The cubic root of 28387132 is about 305.0519735849.

The spelling of 28387132 in words is "twenty-eight million, three hundred eighty-seven thousand, one hundred thirty-two".