86644844 has 24 divisors (see below), whose sum is σ = 178138128. Its totient is φ = 36354240.

The previous prime is 86644843. The next prime is 86644867. The reversal of 86644844 is 44844668.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 86644795 and 86644804.

It is not an unprimeable number, because it can be changed into a prime (86644843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75167 + ... + 76310.

It is an arithmetic number, because the mean of its divisors is an integer number (7422422).

Almost surely, 2^86644844 is an apocalyptic number.

It is an amenable number.

86644844 is an abundant number, since it is smaller than the sum of its proper divisors (91493284).

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

86644844 is a wasteful number, since it uses less digits than its factorization.

86644844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151505 (or 151503 counting only the distinct ones).

The product of its digits is 589824, while the sum is 44.

The square root of 86644844 is about 9308.3212235075. The cubic root of 86644844 is about 442.5009846021.

The spelling of 86644844 in words is "eighty-six million, six hundred forty-four thousand, eight hundred forty-four".