658432 has 22 divisors (see below), whose sum is σ = 1318268. Its totient is φ = 328704.

The previous prime is 658417. The next prime is 658433. The reversal of 658432 is 234856.

It is a self number, because there is not a number n which added to its sum of digits gives 658432.

It is not an unprimeable number, because it can be changed into a prime (658433) by changing a digit.

658432 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703 + ... + 1345.

658432 is a Friedman number, since it can be written as 8^3*(6^4-5*2), using all its digits and the basic arithmetic operations.

2⁶⁵⁸⁴³² 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 658432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659134).

658432 is an abundant number, since it is smaller than the sum of its proper divisors (659836).

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

658432 is an equidigital number, since it uses as much as digits as its factorization.

658432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 645 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 658432 is about 811.4382293188. The cubic root of 658432 is about 86.9968730985.

The spelling of 658432 in words is "six hundred fifty-eight thousand, four hundred thirty-two".