85841878 has 4 divisors (see below), whose sum is σ = 128762820. Its totient is φ = 42920938.

The previous prime is 85841863. The next prime is 85841879. The reversal of 85841878 is 87814858.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85841879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21460468 + ... + 21460471.

It is an arithmetic number, because the mean of its divisors is an integer number (32190705).

Almost surely, 2^85841878 is an apocalyptic number.

85841878 is a deficient number, since it is larger than the sum of its proper divisors (42920942).

85841878 is a wasteful number, since it uses less digits than its factorization.

85841878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42920941.

The product of its digits is 573440, while the sum is 49.

The square root of 85841878 is about 9265.0892062624. The cubic root of 85841878 is about 441.1298065203.

The spelling of 85841878 in words is "eighty-five million, eight hundred forty-one thousand, eight hundred seventy-eight".