85821432 has 16 divisors (see below), whose sum is σ = 214553640. Its totient is φ = 28607136.

The previous prime is 85821409. The next prime is 85821443. The reversal of 85821432 is 23412858.

It is a junction number, because it is equal to n+sod(n) for n = 85821393 and 85821402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787923 + ... + 1787970.

Almost surely, 2^85821432 is an apocalyptic number.

It is an amenable number.

85821432 is an abundant number, since it is smaller than the sum of its proper divisors (128732208).

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

85821432 is a wasteful number, since it uses less digits than its factorization.

85821432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575902 (or 3575898 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 85821432 is about 9263.9857512844. The cubic root of 85821432 is about 441.0947806626.

The spelling of 85821432 in words is "eighty-five million, eight hundred twenty-one thousand, four hundred thirty-two".