28004777 has 8 divisors (see below), whose sum is σ = 29305536. Its totient is φ = 26710992.

The previous prime is 28004761. The next prime is 28004813. The reversal of 28004777 is 77740082.

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 28004777 - 2⁴ = 28004761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28004707) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7598 + ... + 10664.

It is an arithmetic number, because the mean of its divisors is an integer number (3663192).

Almost surely, 2^28004777 is an apocalyptic number.

It is an amenable number.

28004777 is a deficient number, since it is larger than the sum of its proper divisors (1300759).

28004777 is a wasteful number, since it uses less digits than its factorization.

28004777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 28004777 is about 5291.9539869504. The cubic root of 28004777 is about 303.6761649979.

The spelling of 28004777 in words is "twenty-eight million, four thousand, seven hundred seventy-seven".