399623438196 has 36 divisors (see below), whose sum is σ = 1017426592000. Its totient is φ = 132249481488.

The previous prime is 399623438183. The next prime is 399623438197. The reversal of 399623438196 is 691834326993.

399623438196 is a `hidden beast` number, since 3 + 9 + 9 + 6 + 2 + 3 + 438 + 196 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399623438197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39925396 + ... + 39935403.

Almost surely, 2^399623438196 is an apocalyptic number.

399623438196 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399623438196 is an abundant number, since it is smaller than the sum of its proper divisors (617803153804).

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

399623438196 is a wasteful number, since it uses less digits than its factorization.

399623438196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79860948 (or 79860943 counting only the distinct ones).

The product of its digits is 45349632, while the sum is 63.

The spelling of 399623438196 in words is "three hundred ninety-nine billion, six hundred twenty-three million, four hundred thirty-eight thousand, one hundred ninety-six".