28785905433 has 12 divisors (see below), whose sum is σ = 41599591488. Its totient is φ = 19181395800.

The previous prime is 28785905419. The next prime is 28785905479. The reversal of 28785905433 is 33450958782.

28785905433 is a `hidden beast` number, since 2 + 8 + 7 + 8 + 5 + 90 + 543 + 3 = 666.

It is not a de Polignac number, because 28785905433 - 2¹² = 28785901337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28785905433.

It is not an unprimeable number, because it can be changed into a prime (28785905033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 747493 + ... + 785058.

It is an arithmetic number, because the mean of its divisors is an integer number (3466632624).

Almost surely, 2^28785905433 is an apocalyptic number.

It is an amenable number.

28785905433 is a deficient number, since it is larger than the sum of its proper divisors (12813686055).

28785905433 is a wasteful number, since it uses less digits than its factorization.

28785905433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534644 (or 1534641 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 28785905433 in words is "twenty-eight billion, seven hundred eighty-five million, nine hundred five thousand, four hundred thirty-three".