399818001996 has 72 divisors (see below), whose sum is σ = 1197808684800. Its totient is φ = 114233712912.

The previous prime is 399818001959. The next prime is 399818002033. The reversal of 399818001996 is 699100818993.

399818001996 is a `hidden beast` number, since 399 + 81 + 80 + 0 + 1 + 9 + 96 = 666.

It is an interprime number because it is at equal distance from previous prime (399818001959) and next prime (399818002033).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 29374296 + ... + 29387903.

Almost surely, 2^399818001996 is an apocalyptic number.

399818001996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399818001996 is an abundant number, since it is smaller than the sum of its proper divisors (797990682804).

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

399818001996 is a wasteful number, since it uses less digits than its factorization.

399818001996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58762225 (or 58762211 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 63.

The spelling of 399818001996 in words is "three hundred ninety-nine billion, eight hundred eighteen million, one thousand, nine hundred ninety-six".