28687894 has 8 divisors (see below), whose sum is σ = 43066800. Its totient is φ = 14332296.

The previous prime is 28687889. The next prime is 28687909. The reversal of 28687894 is 49878682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (5383350).

Almost surely, 2^28687894 is an apocalyptic number.

28687894 is a deficient number, since it is larger than the sum of its proper divisors (14378906).

28687894 is a wasteful number, since it uses less digits than its factorization.

28687894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11654.

The product of its digits is 1548288, while the sum is 52.

The square root of 28687894 is about 5356.1081019711. The cubic root of 28687894 is about 306.1255340946.

The spelling of 28687894 in words is "twenty-eight million, six hundred eighty-seven thousand, eight hundred ninety-four".