28785036189 has 32 divisors (see below), whose sum is σ = 47246536960. Its totient is φ = 15180244992.

The previous prime is 28785036167. The next prime is 28785036211. The reversal of 28785036189 is 98163058782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28785036167) and next prime (28785036211).

It is not a de Polignac number, because 28785036189 - 2¹⁷ = 28784905117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785036139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2119629 + ... + 2133165.

It is an arithmetic number, because the mean of its divisors is an integer number (1476454280).

Almost surely, 2^28785036189 is an apocalyptic number.

It is an amenable number.

28785036189 is a deficient number, since it is larger than the sum of its proper divisors (18461500771).

28785036189 is a wasteful number, since it uses less digits than its factorization.

28785036189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21349.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 28785036189 in words is "twenty-eight billion, seven hundred eighty-five million, thirty-six thousand, one hundred eighty-nine".