85670520 has 64 divisors (see below), whose sum is σ = 276786720. Its totient is φ = 21087744.

The previous prime is 85670509. The next prime is 85670521. The reversal of 85670520 is 2507658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85670521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25899 + ... + 29018.

Almost surely, 2^85670520 is an apocalyptic number.

It is an amenable number.

85670520 is an abundant number, since it is smaller than the sum of its proper divisors (191116200).

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

85670520 is a wasteful number, since it uses less digits than its factorization.

85670520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54944 (or 54940 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 85670520 is about 9255.8370772178. The cubic root of 85670520 is about 440.8360824567.

The spelling of 85670520 in words is "eighty-five million, six hundred seventy thousand, five hundred twenty".