399484081 has 8 divisors (see below), whose sum is σ = 401687424. Its totient is φ = 397286640.

The previous prime is 399484039. The next prime is 399484087. The reversal of 399484081 is 180484993.

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

It is a cyclic number.

It is not a de Polignac number, because 399484081 - 2¹⁹ = 398959793 is a prime.

It is a super-2 number, since 2×399484081² = 319175061944829122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399484087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208530 + ... + 210436.

It is an arithmetic number, because the mean of its divisors is an integer number (50210928).

Almost surely, 2^399484081 is an apocalyptic number.

It is an amenable number.

399484081 is a deficient number, since it is larger than the sum of its proper divisors (2203343).

399484081 is a wasteful number, since it uses less digits than its factorization.

399484081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 399484081 is about 19987.0978633718. The cubic root of 399484081 is about 736.4893864632.

The spelling of 399484081 in words is "three hundred ninety-nine million, four hundred eighty-four thousand, eighty-one".