85581582 has 16 divisors (see below), whose sum is σ = 171316992. Its totient is φ = 28501560.

The previous prime is 85581563. The next prime is 85581589. The reversal of 85581582 is 28518558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85581589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (10707312).

Almost surely, 2^85581582 is an apocalyptic number.

85581582 is an abundant number, since it is smaller than the sum of its proper divisors (85735410).

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

85581582 is a wasteful number, since it uses less digits than its factorization.

85581582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12823.

The product of its digits is 128000, while the sum is 42.

The square root of 85581582 is about 9251.0314019573. The cubic root of 85581582 is about 440.6834797690.

The spelling of 85581582 in words is "eighty-five million, five hundred eighty-one thousand, five hundred eighty-two".