85591506 has 64 divisors (see below), whose sum is σ = 229856256. Its totient is φ = 20520000.

The previous prime is 85591501. The next prime is 85591529. The reversal of 85591506 is 60519558.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (85591501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120 + ... + 13131.

It is an arithmetic number, because the mean of its divisors is an integer number (3591504).

Almost surely, 2^85591506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85591506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114928128).

85591506 is an abundant number, since it is smaller than the sum of its proper divisors (144264750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85591506 is a wasteful number, since it uses less digits than its factorization.

85591506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 85591506 is about 9251.5677590341. The cubic root of 85591506 is about 440.7005129270.

The spelling of 85591506 in words is "eighty-five million, five hundred ninety-one thousand, five hundred six".