28610887389 has 24 divisors (see below), whose sum is σ = 44397285408. Its totient is φ = 16341262560.

The previous prime is 28610887387. The next prime is 28610887391. The reversal of 28610887389 is 98378801682.

It is an interprime number because it is at equal distance from previous prime (28610887387) and next prime (28610887391).

It is not a de Polignac number, because 28610887389 - 2¹ = 28610887387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28610887387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269274 + ... + 360180.

It is an arithmetic number, because the mean of its divisors is an integer number (1849886892).

Almost surely, 2^28610887389 is an apocalyptic number.

It is an amenable number.

28610887389 is a deficient number, since it is larger than the sum of its proper divisors (15786398019).

28610887389 is a wasteful number, since it uses less digits than its factorization.

28610887389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93065 (or 93058 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 60.

The spelling of 28610887389 in words is "twenty-eight billion, six hundred ten million, eight hundred eighty-seven thousand, three hundred eighty-nine".