28556776 has 8 divisors (see below), whose sum is σ = 53543970. Its totient is φ = 14278384.

The previous prime is 28556747. The next prime is 28556779. The reversal of 28556776 is 67765582.

It can be written as a sum of positive squares in only one way, i.e., 19131876 + 9424900 = 4374^2 + 3070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28556779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1784791 + ... + 1784806.

Almost surely, 2^28556776 is an apocalyptic number.

It is an amenable number.

28556776 is a deficient number, since it is larger than the sum of its proper divisors (24987194).

28556776 is a wasteful number, since it uses less digits than its factorization.

28556776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569603 (or 3569599 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The square root of 28556776 is about 5343.8540399229. The cubic root of 28556776 is about 305.6584395700.

The spelling of 28556776 in words is "twenty-eight million, five hundred fifty-six thousand, seven hundred seventy-six".