399982 has 8 divisors (see below), whose sum is σ = 654552. Its totient is φ = 181800.

The previous prime is 399979. The next prime is 399983. The reversal of 399982 is 289993.

It is a happy number.

399982 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399983) 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, 9069 + ... + 9112.

It is an arithmetic number, because the mean of its divisors is an integer number (81819).

2³⁹⁹⁹⁸² is an apocalyptic number.

399982 is a deficient number, since it is larger than the sum of its proper divisors (254570).

399982 is a wasteful number, since it uses less digits than its factorization.

399982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18194.

The product of its digits is 34992, while the sum is 40.

The square root of 399982 is about 632.4413016241. The cubic root of 399982 is about 73.6795247468.

It can be divided in two parts, 39998 and 2, that added together give a square (40000 = 200²).

The spelling of 399982 in words is "three hundred ninety-nine thousand, nine hundred eighty-two".