85489566 has 16 divisors (see below), whose sum is σ = 181036944. Its totient is φ = 26820224.

The previous prime is 85489559. The next prime is 85489567. The reversal of 85489566 is 66598458.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85489567) 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, 418965 + ... + 419168.

It is an arithmetic number, because the mean of its divisors is an integer number (11314809).

Almost surely, 2^85489566 is an apocalyptic number.

85489566 is an abundant number, since it is smaller than the sum of its proper divisors (95547378).

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

85489566 is a wasteful number, since it uses less digits than its factorization.

85489566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838155.

The product of its digits is 2073600, while the sum is 51.

The square root of 85489566 is about 9246.0567811365. The cubic root of 85489566 is about 440.5254844321.

The spelling of 85489566 in words is "eighty-five million, four hundred eighty-nine thousand, five hundred sixty-six".