85720872 has 32 divisors (see below), whose sum is σ = 217504800. Its totient is φ = 28146624.

The previous prime is 85720829. The next prime is 85720889. The reversal of 85720872 is 27802758.

It is a self number, because there is not a number n which added to its sum of digits gives 85720872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25047 + ... + 28262.

It is an arithmetic number, because the mean of its divisors is an integer number (6797025).

Almost surely, 2^85720872 is an apocalyptic number.

It is an amenable number.

85720872 is an abundant number, since it is smaller than the sum of its proper divisors (131783928).

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

85720872 is a wasteful number, since it uses less digits than its factorization.

85720872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53385 (or 53381 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 85720872 is about 9258.5566909751. The cubic root of 85720872 is about 440.9224312231.

The spelling of 85720872 in words is "eighty-five million, seven hundred twenty thousand, eight hundred seventy-two".