28776704 has 54 divisors (see below), whose sum is σ = 63205590. Its totient is φ = 13066240.

The previous prime is 28776679. The next prime is 28776731. The reversal of 28776704 is 40767782.

It can be written as a sum of positive squares in only one way, i.e., 16386304 + 12390400 = 4048^2 + 3520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30512 + ... + 31440.

Almost surely, 2^28776704 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 28776704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31602795).

28776704 is an abundant number, since it is smaller than the sum of its proper divisors (34428886).

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

28776704 is an equidigital number, since it uses as much as digits as its factorization.

28776704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 28776704 is about 5364.3922302531. The cubic root of 28776704 is about 306.4411027717.

The spelling of 28776704 in words is "twenty-eight million, seven hundred seventy-six thousand, seven hundred four".