85540840 has 64 divisors (see below), whose sum is σ = 239967360. Its totient is φ = 26661120.

The previous prime is 85540823. The next prime is 85540853. The reversal of 85540840 is 4804558.

It is a junction number, because it is equal to n+sod(n) for n = 85540796 and 85540805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10807 + ... + 16966.

It is an arithmetic number, because the mean of its divisors is an integer number (3749490).

Almost surely, 2^85540840 is an apocalyptic number.

It is an amenable number.

85540840 is an abundant number, since it is smaller than the sum of its proper divisors (154426520).

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

85540840 is a wasteful number, since it uses less digits than its factorization.

85540840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27802 (or 27798 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 85540840 is about 9248.8291150826. The cubic root of 85540840 is about 440.6135380215.

The spelling of 85540840 in words is "eighty-five million, five hundred forty thousand, eight hundred forty".