85720580 has 48 divisors (see below), whose sum is σ = 202728960. Its totient is φ = 30163200.

The previous prime is 85720573. The next prime is 85720631. The reversal of 85720580 is 8502758.

It is a self number, because there is not a number n which added to its sum of digits gives 85720580.

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, 536 + ... + 13104.

It is an arithmetic number, because the mean of its divisors is an integer number (4223520).

Almost surely, 2^85720580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85720580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101364480).

85720580 is an abundant number, since it is smaller than the sum of its proper divisors (117008380).

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

85720580 is a wasteful number, since it uses less digits than its factorization.

85720580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620 (or 12618 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 85720580 is about 9258.5409217652. The cubic root of 85720580 is about 440.9219305691.

The spelling of 85720580 in words is "eighty-five million, seven hundred twenty thousand, five hundred eighty".