8642432 has 32 divisors (see below), whose sum is σ = 17350200. Its totient is φ = 4288000.

The previous prime is 8642429. The next prime is 8642449. The reversal of 8642432 is 2342468.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 8642395 and 8642404.

It is a congruent number.

It is an unprimeable number.

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, 31994 + ... + 32262.

Almost surely, 2^8642432 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 8642432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8675100).

8642432 is an abundant number, since it is smaller than the sum of its proper divisors (8707768).

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

8642432 is a wasteful number, since it uses less digits than its factorization.

8642432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 522 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 8642432 is about 2939.8013538333. The cubic root of 8642432 is about 205.2163648575.

Subtracting from 8642432 its sum of digits (29), we obtain a triangular number (8642403 = T₄₁₅₇).

The spelling of 8642432 in words is "eight million, six hundred forty-two thousand, four hundred thirty-two".