28573307787 has 32 divisors (see below), whose sum is σ = 40645219392. Its totient is φ = 17792446464.

The previous prime is 28573307783. The next prime is 28573307837. The reversal of 28573307787 is 78770337582.

It is not a de Polignac number, because 28573307787 - 2² = 28573307783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28573307783) 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 31 ways as a sum of consecutive naturals, for example, 8782053 + ... + 8785305.

It is an arithmetic number, because the mean of its divisors is an integer number (1270163106).

Almost surely, 2^28573307787 is an apocalyptic number.

28573307787 is a deficient number, since it is larger than the sum of its proper divisors (12071911605).

28573307787 is a wasteful number, since it uses less digits than its factorization.

28573307787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 13829760, while the sum is 57.

The spelling of 28573307787 in words is "twenty-eight billion, five hundred seventy-three million, three hundred seven thousand, seven hundred eighty-seven".