28316878 has 8 divisors (see below), whose sum is σ = 44710920. Its totient is φ = 13413240.

The previous prime is 28316851. The next prime is 28316903. The reversal of 28316878 is 87861382.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372553 + ... + 372628.

It is an arithmetic number, because the mean of its divisors is an integer number (5588865).

Almost surely, 2^28316878 is an apocalyptic number.

28316878 is a deficient number, since it is larger than the sum of its proper divisors (16394042).

28316878 is a wasteful number, since it uses less digits than its factorization.

28316878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745202.

The product of its digits is 129024, while the sum is 43.

The square root of 28316878 is about 5321.3605403130. The cubic root of 28316878 is about 304.8001126909.

It can be divided in two parts, 283 and 16878, that added together give a square (17161 = 131²).

The spelling of 28316878 in words is "twenty-eight million, three hundred sixteen thousand, eight hundred seventy-eight".