399100 has 36 divisors (see below), whose sum is σ = 935704. Its totient is φ = 146880.

The previous prime is 399097. The next prime is 399101. The reversal of 399100 is 1993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399101) 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 11 ways as a sum of consecutive naturals, for example, 1147 + ... + 1453.

2³⁹⁹¹⁰⁰ 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 399100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467852).

399100 is an abundant number, since it is smaller than the sum of its proper divisors (536604).

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

399100 is a wasteful number, since it uses less digits than its factorization.

399100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 399100 is about 631.7436188835. The cubic root of 399100 is about 73.6253280031.

The spelling of 399100 in words is "three hundred ninety-nine thousand, one hundred".