89928639 has 12 divisors (see below), whose sum is σ = 129993136. Its totient is φ = 59908032.

The previous prime is 89928637. The next prime is 89928679. The reversal of 89928639 is 93682998.

It is not a de Polignac number, because 89928639 - 2¹ = 89928637 is a prime.

It is a super-2 number, since 2×89928639² = 16174320224784642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89928637) 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 11 ways as a sum of consecutive naturals, for example, 13182 + ... + 18804.

Almost surely, 2^89928639 is an apocalyptic number.

89928639 is a deficient number, since it is larger than the sum of its proper divisors (40064497).

89928639 is a wasteful number, since it uses less digits than its factorization.

89928639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406 (or 7403 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 89928639 is about 9483.0711797392. The cubic root of 89928639 is about 448.0219998098.

The spelling of 89928639 in words is "eighty-nine million, nine hundred twenty-eight thousand, six hundred thirty-nine".