28865805477 has 8 divisors (see below), whose sum is σ = 38920187520. Its totient is φ = 19027646880.

The previous prime is 28865805473. The next prime is 28865805509. The reversal of 28865805477 is 77450856882.

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

It is not a de Polignac number, because 28865805477 - 2² = 28865805473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28865805477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865805473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54055549 + ... + 54056082.

It is an arithmetic number, because the mean of its divisors is an integer number (4865023440).

Almost surely, 2^28865805477 is an apocalyptic number.

It is an amenable number.

28865805477 is a deficient number, since it is larger than the sum of its proper divisors (10054382043).

28865805477 is a wasteful number, since it uses less digits than its factorization.

28865805477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108111723.

The product of its (nonzero) digits is 30105600, while the sum is 60.

The spelling of 28865805477 in words is "twenty-eight billion, eight hundred sixty-five million, eight hundred five thousand, four hundred seventy-seven".