28776065 has 8 divisors (see below), whose sum is σ = 34561320. Its totient is φ = 23000832.

The previous prime is 28776043. The next prime is 28776101. The reversal of 28776065 is 56067782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15649936 + 13126129 = 3956^2 + 3623^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28776065 - 2⁶ = 28776001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7337 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (4320165).

Almost surely, 2^28776065 is an apocalyptic number.

It is an amenable number.

28776065 is a deficient number, since it is larger than the sum of its proper divisors (5785255).

28776065 is a wasteful number, since it uses less digits than its factorization.

28776065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 28776065 is about 5364.3326705192. The cubic root of 28776065 is about 306.4388345329.

The spelling of 28776065 in words is "twenty-eight million, seven hundred seventy-six thousand, sixty-five".