658398 has 32 divisors (see below), whose sum is σ = 1483776. Its totient is φ = 193248.

The previous prime is 658391. The next prime is 658403. The reversal of 658398 is 893856.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 658398.

It is not an unprimeable number, because it can be changed into a prime (658391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1611 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (46368).

2⁶⁵⁸³⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 658398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741888).

658398 is an abundant number, since it is smaller than the sum of its proper divisors (825378).

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

658398 is a wasteful number, since it uses less digits than its factorization.

658398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its digits is 51840, while the sum is 39.

The square root of 658398 is about 811.4172785934. The cubic root of 658398 is about 86.9953756295.

The spelling of 658398 in words is "six hundred fifty-eight thousand, three hundred ninety-eight".