399066 has 16 divisors (see below), whose sum is σ = 804384. Its totient is φ = 131984.

The previous prime is 399059. The next prime is 399067. The reversal of 399066 is 660993.

It is not an unprimeable number, because it can be changed into a prime (399067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216 + ... + 1508.

It is an arithmetic number, because the mean of its divisors is an integer number (50274).

2³⁹⁹⁰⁶⁶ is an apocalyptic number.

399066 is an abundant number, since it is smaller than the sum of its proper divisors (405318).

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

399066 is a wasteful number, since it uses less digits than its factorization.

399066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 399066 is about 631.7167086598. The cubic root of 399066 is about 73.6232371886.

The spelling of 399066 in words is "three hundred ninety-nine thousand, sixty-six".