8420832 has 72 divisors (see below), whose sum is σ = 27374256. Its totient is φ = 2405376.

The previous prime is 8420827. The next prime is 8420833. The reversal of 8420832 is 2380248.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 8420796 and 8420805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420833) 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, 73 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (380198).

Almost surely, 2^8420832 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 8420832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13687128).

8420832 is an abundant number, since it is smaller than the sum of its proper divisors (18953424).

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

8420832 is a wasteful number, since it uses less digits than its factorization.

8420832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200 (or 4189 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 8420832 is about 2901.8669852355. The cubic root of 8420832 is about 203.4471768352.

The spelling of 8420832 in words is "eight million, four hundred twenty thousand, eight hundred thirty-two".