399206844463 has 16 divisors (see below), whose sum is σ = 461024705344. Its totient is φ = 338587361280.

The previous prime is 399206844457. The next prime is 399206844467. The reversal of 399206844463 is 364448602993.

It is a happy number.

It is not a de Polignac number, because 399206844463 - 2²⁹ = 398669973551 is a prime.

It is a super-2 number, since 2×399206844463² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399206844398 and 399206844407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399206844467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3844183 + ... + 3946663.

It is an arithmetic number, because the mean of its divisors is an integer number (28814044084).

Almost surely, 2^399206844463 is an apocalyptic number.

399206844463 is a deficient number, since it is larger than the sum of its proper divisors (61817860881).

399206844463 is a wasteful number, since it uses less digits than its factorization.

399206844463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108322.

The product of its (nonzero) digits is 26873856, while the sum is 58.

The spelling of 399206844463 in words is "three hundred ninety-nine billion, two hundred six million, eight hundred forty-four thousand, four hundred sixty-three".