86921432 has 48 divisors (see below), whose sum is σ = 177876000. Its totient is φ = 39801216.

The previous prime is 86921423. The next prime is 86921437. The reversal of 86921432 is 23412968.

It is a junction number, because it is equal to n+sod(n) for n = 86921392 and 86921401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86921437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322994 + ... + 323262.

It is an arithmetic number, because the mean of its divisors is an integer number (3705750).

Almost surely, 2^86921432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86921432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88938000).

86921432 is an abundant number, since it is smaller than the sum of its proper divisors (90954568).

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

86921432 is a wasteful number, since it uses less digits than its factorization.

86921432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 523 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 86921432 is about 9323.1664149043. The cubic root of 86921432 is about 442.9713355789.

The spelling of 86921432 in words is "eighty-six million, nine hundred twenty-one thousand, four hundred thirty-two".