28773471779 has 8 divisors (see below), whose sum is σ = 31986390912. Its totient is φ = 25703349120.

The previous prime is 28773471773. The next prime is 28773471781. The reversal of 28773471779 is 97717437782.

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 28773471779 - 2¹² = 28773467683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28773471773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35698694 + ... + 35699499.

It is an arithmetic number, because the mean of its divisors is an integer number (3998298864).

Almost surely, 2^28773471779 is an apocalyptic number.

28773471779 is a deficient number, since it is larger than the sum of its proper divisors (3212919133).

28773471779 is a wasteful number, since it uses less digits than its factorization.

28773471779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71398237.

The product of its digits is 29042496, while the sum is 62.

The spelling of 28773471779 in words is "twenty-eight billion, seven hundred seventy-three million, four hundred seventy-one thousand, seven hundred seventy-nine".