399558 has 8 divisors (see below), whose sum is σ = 799128. Its totient is φ = 133184.

The previous prime is 399557. The next prime is 399571. The reversal of 399558 is 855993.

It is a sphenic number, since it is the product of 3 distinct primes.

399558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33291 + ... + 33302.

It is an arithmetic number, because the mean of its divisors is an integer number (99891).

2³⁹⁹⁵⁵⁸ is an apocalyptic number.

399558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

399558 is a wasteful number, since it uses less digits than its factorization.

399558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66598.

The product of its digits is 48600, while the sum is 39.

The square root of 399558 is about 632.1060037684. The cubic root of 399558 is about 73.6534809384.

The spelling of 399558 in words is "three hundred ninety-nine thousand, five hundred fifty-eight".