86857842 has 16 divisors (see below), whose sum is σ = 179706240. Its totient is φ = 27954192.

The previous prime is 86857819. The next prime is 86857843. The reversal of 86857842 is 24875868.

It is a junction number, because it is equal to n+sod(n) for n = 86857791 and 86857800.

It is not an unprimeable number, because it can be changed into a prime (86857843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249418 + ... + 249765.

It is an arithmetic number, because the mean of its divisors is an integer number (11231640).

Almost surely, 2^86857842 is an apocalyptic number.

86857842 is an abundant number, since it is smaller than the sum of its proper divisors (92848398).

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

86857842 is a wasteful number, since it uses less digits than its factorization.

86857842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499217.

The product of its digits is 860160, while the sum is 48.

The square root of 86857842 is about 9319.7554688951. The cubic root of 86857842 is about 442.8632862039.

The spelling of 86857842 in words is "eighty-six million, eight hundred fifty-seven thousand, eight hundred forty-two".