85181856 has 24 divisors (see below), whose sum is σ = 223602624. Its totient is φ = 28393920.

The previous prime is 85181851. The next prime is 85181861. The reversal of 85181856 is 65818158.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85181851) and next prime (85181861).

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (85181851) 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 3 ways as a sum of consecutive naturals, for example, 443560 + ... + 443751.

It is an arithmetic number, because the mean of its divisors is an integer number (9316776).

Almost surely, 2^85181856 is an apocalyptic number.

It is an amenable number.

85181856 is an abundant number, since it is smaller than the sum of its proper divisors (138420768).

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

85181856 is a wasteful number, since it uses less digits than its factorization.

85181856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887324 (or 887316 counting only the distinct ones).

The product of its digits is 76800, while the sum is 42.

The square root of 85181856 is about 9229.4017140874. The cubic root of 85181856 is about 439.9963085090.

The spelling of 85181856 in words is "eighty-five million, one hundred eighty-one thousand, eight hundred fifty-six".