28586428 has 12 divisors (see below), whose sum is σ = 53874520. Its totient is φ = 13193712.

The previous prime is 28586423. The next prime is 28586429. The reversal of 28586428 is 82468582.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28586423) 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, 274818 + ... + 274921.

Almost surely, 2^28586428 is an apocalyptic number.

It is an amenable number.

28586428 is a deficient number, since it is larger than the sum of its proper divisors (25288092).

28586428 is a wasteful number, since it uses less digits than its factorization.

28586428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549756 (or 549754 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 28586428 is about 5346.6277222189. The cubic root of 28586428 is about 305.7641967099.

The spelling of 28586428 in words is "twenty-eight million, five hundred eighty-six thousand, four hundred twenty-eight".