89191028 has 12 divisors (see below), whose sum is σ = 158643492. Its totient is φ = 43864320.

The previous prime is 89191021. The next prime is 89191043. The reversal of 89191028 is 82019198.

It can be written as a sum of positive squares in 2 ways, for example, as 868624 + 88322404 = 932^2 + 9398^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 89190982 and 89191000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89191021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182525 + ... + 183012.

It is an arithmetic number, because the mean of its divisors is an integer number (13220291).

Almost surely, 2^89191028 is an apocalyptic number.

It is an amenable number.

89191028 is a deficient number, since it is larger than the sum of its proper divisors (69452464).

89191028 is a wasteful number, since it uses less digits than its factorization.

89191028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365602 (or 365600 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 89191028 is about 9444.1001688885. The cubic root of 89191028 is about 446.7937162410.

It can be divided in two parts, 891 and 91028, that added together give a palindrome (91919).

The spelling of 89191028 in words is "eighty-nine million, one hundred ninety-one thousand, twenty-eight".