28078776 has 96 divisors (see below), whose sum is σ = 83931120. Its totient is φ = 8479680.

The previous prime is 28078763. The next prime is 28078783. The reversal of 28078776 is 67787082.

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 23 ways as a sum of consecutive naturals, for example, 95686 + ... + 95978.

Almost surely, 2^28078776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28078776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41965560).

28078776 is an abundant number, since it is smaller than the sum of its proper divisors (55852344).

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

28078776 is a wasteful number, since it uses less digits than its factorization.

28078776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 28078776 is about 5298.9410262806. The cubic root of 28078776 is about 303.9434047460.

The spelling of 28078776 in words is "twenty-eight million, seventy-eight thousand, seven hundred seventy-six".