85867520 has 88 divisors (see below), whose sum is σ = 213019008. Its totient is φ = 33177600.

The previous prime is 85867511. The next prime is 85867531. The reversal of 85867520 is 2576858.

It is a congruent number.

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, 158450 + ... + 158990.

Almost surely, 2^85867520 is an apocalyptic number.

85867520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85867520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106509504).

85867520 is an abundant number, since it is smaller than the sum of its proper divisors (127151488).

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

85867520 is a wasteful number, since it uses less digits than its factorization.

85867520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 85867520 is about 9266.4728996528. The cubic root of 85867520 is about 441.1737257380.

The spelling of 85867520 in words is "eighty-five million, eight hundred sixty-seven thousand, five hundred twenty".