86857120 has 48 divisors (see below), whose sum is σ = 234517248. Its totient is φ = 29779200.

The previous prime is 86857109. The next prime is 86857139. The reversal of 86857120 is 2175868.

It is a self number, because there is not a number n which added to its sum of digits gives 86857120.

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, 37656 + ... + 39895.

It is an arithmetic number, because the mean of its divisors is an integer number (4885776).

Almost surely, 2^86857120 is an apocalyptic number.

86857120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86857120 is an abundant number, since it is smaller than the sum of its proper divisors (147660128).

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

86857120 is a wasteful number, since it uses less digits than its factorization.

86857120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77573 (or 77565 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 86857120 is about 9319.7167338927. The cubic root of 86857120 is about 442.8620591100.

The spelling of 86857120 in words is "eighty-six million, eight hundred fifty-seven thousand, one hundred twenty".