85557885 has 32 divisors (see below), whose sum is σ = 157440000. Its totient is φ = 38864448.

The previous prime is 85557881. The next prime is 85557887. The reversal of 85557885 is 58875558.

It is not a de Polignac number, because 85557885 - 2² = 85557881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85557881) 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 31 ways as a sum of consecutive naturals, for example, 14616 + ... + 19614.

It is an arithmetic number, because the mean of its divisors is an integer number (4920000).

Almost surely, 2^85557885 is an apocalyptic number.

It is an amenable number.

85557885 is a deficient number, since it is larger than the sum of its proper divisors (71882115).

85557885 is a wasteful number, since it uses less digits than its factorization.

85557885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its digits is 2240000, while the sum is 51.

The square root of 85557885 is about 9249.7505371767. The cubic root of 85557885 is about 440.6428018561.

The spelling of 85557885 in words is "eighty-five million, five hundred fifty-seven thousand, eight hundred eighty-five".