88639000605 has 48 divisors (see below), whose sum is σ = 159955164720. Its totient is φ = 45366303744.

The previous prime is 88639000577. The next prime is 88639000607. The reversal of 88639000605 is 50600093688.

88639000605 is a `hidden beast` number, since 8 + 8 + 6 + 39 + 0 + 0 + 0 + 605 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 15876 + 88638984729 = 126^2 + 297723^2 .

It is not a de Polignac number, because 88639000605 - 2⁸ = 88639000349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88639000607) 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 47 ways as a sum of consecutive naturals, for example, 243090 + ... + 486179.

It is an arithmetic number, because the mean of its divisors is an integer number (3332399265).

Almost surely, 2^88639000605 is an apocalyptic number.

88639000605 is the 243090-th pentagonal number.

It is an amenable number.

88639000605 is a deficient number, since it is larger than the sum of its proper divisors (71316164115).

88639000605 is a wasteful number, since it uses less digits than its factorization.

88639000605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729390 (or 729387 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 88639000605 in words is "eighty-eight billion, six hundred thirty-nine million, six hundred five", and thus it is an aban number.