28773332919 has 16 divisors (see below), whose sum is σ = 42663859200. Its totient is φ = 19165707288.

The previous prime is 28773332909. The next prime is 28773332921. The reversal of 28773332919 is 91923337782.

28773332919 is a `hidden beast` number, since 287 + 7 + 33 + 329 + 1 + 9 = 666.

It is not a de Polignac number, because 28773332919 - 2²¹ = 28771235767 is a prime.

It is a super-2 number, since 2×28773332919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28773332909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426759 + ... + 489560.

It is an arithmetic number, because the mean of its divisors is an integer number (2666491200).

Almost surely, 2^28773332919 is an apocalyptic number.

28773332919 is a deficient number, since it is larger than the sum of its proper divisors (13890526281).

28773332919 is a wasteful number, since it uses less digits than its factorization.

28773332919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917491 (or 917485 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 28773332919 in words is "twenty-eight billion, seven hundred seventy-three million, three hundred thirty-two thousand, nine hundred nineteen".