28872776 has 8 divisors (see below), whose sum is σ = 54136470. Its totient is φ = 14436384.

The previous prime is 28872763. The next prime is 28872787. The reversal of 28872776 is 67727882.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26770276 + 2102500 = 5174^2 + 1450^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28872776.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804541 + ... + 1804556.

Almost surely, 2^28872776 is an apocalyptic number.

It is an amenable number.

28872776 is a deficient number, since it is larger than the sum of its proper divisors (25263694).

28872776 is a wasteful number, since it uses less digits than its factorization.

28872776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609103 (or 3609099 counting only the distinct ones).

The product of its digits is 526848, while the sum is 47.

The square root of 28872776 is about 5373.3393713779. The cubic root of 28872776 is about 306.7817453004.

The spelling of 28872776 in words is "twenty-eight million, eight hundred seventy-two thousand, seven hundred seventy-six".