28995686 has 24 divisors (see below), whose sum is σ = 46421424. Its totient is φ = 13556400.

The previous prime is 28995677. The next prime is 28995713. The reversal of 28995686 is 68659982.

It is a happy number.

It is a super-2 number, since 2×28995686² = 1681499613221192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 287036 + ... + 287136.

It is an arithmetic number, because the mean of its divisors is an integer number (1934226).

Almost surely, 2^28995686 is an apocalyptic number.

28995686 is a deficient number, since it is larger than the sum of its proper divisors (17425738).

28995686 is a wasteful number, since it uses less digits than its factorization.

28995686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 205 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 28995686 is about 5384.7642473928. The cubic root of 28995686 is about 307.2164473593.

The spelling of 28995686 in words is "twenty-eight million, nine hundred ninety-five thousand, six hundred eighty-six".