86644432 has 20 divisors (see below), whose sum is σ = 191855776. Its totient is φ = 37133280.

The previous prime is 86644429. The next prime is 86644433. The reversal of 86644432 is 23444668.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86644391 and 86644400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86644433) 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 3 ways as a sum of consecutive naturals, for example, 386694 + ... + 386917.

Almost surely, 2^86644432 is an apocalyptic number.

It is an amenable number.

86644432 is an abundant number, since it is smaller than the sum of its proper divisors (105211344).

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

86644432 is a wasteful number, since it uses less digits than its factorization.

86644432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773626 (or 773620 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 86644432 is about 9308.2990927451. The cubic root of 86644432 is about 442.5002832305.

The spelling of 86644432 in words is "eighty-six million, six hundred forty-four thousand, four hundred thirty-two".