85504878 has 24 divisors (see below), whose sum is σ = 185959800. Its totient is φ = 28394064.

The previous prime is 85504873. The next prime is 85504901. The reversal of 85504878 is 87840558.

It is a super-2 number, since 2×85504878² = 14622168323589768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85504873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3988 + ... + 13671.

It is an arithmetic number, because the mean of its divisors is an integer number (7748325).

Almost surely, 2^85504878 is an apocalyptic number.

85504878 is an abundant number, since it is smaller than the sum of its proper divisors (100454922).

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

85504878 is a wasteful number, since it uses less digits than its factorization.

85504878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17936 (or 17933 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 85504878 is about 9246.8847727221. The cubic root of 85504878 is about 440.5517836397.

The spelling of 85504878 in words is "eighty-five million, five hundred four thousand, eight hundred seventy-eight".