28816878 has 8 divisors (see below), whose sum is σ = 57633768. Its totient is φ = 9605624.

The previous prime is 28816877. The next prime is 28816883. The reversal of 28816878 is 87861882.

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

28816878 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2401401 + ... + 2401412.

It is an arithmetic number, because the mean of its divisors is an integer number (7204221).

Almost surely, 2^28816878 is an apocalyptic number.

28816878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28816878 is a wasteful number, since it uses less digits than its factorization.

28816878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802818.

The product of its digits is 344064, while the sum is 48.

The square root of 28816878 is about 5368.1354304824. The cubic root of 28816878 is about 306.5836398317.

The spelling of 28816878 in words is "twenty-eight million, eight hundred sixteen thousand, eight hundred seventy-eight".