399800180004 has 12 divisors (see below), whose sum is σ = 932867086704. Its totient is φ = 133266726664.

The previous prime is 399800179991. The next prime is 399800180009. The reversal of 399800180004 is 400081008993.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (399800180009) 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, 16658340822 + ... + 16658340845.

It is an arithmetic number, because the mean of its divisors is an integer number (77738923892).

Almost surely, 2^399800180004 is an apocalyptic number.

It is an amenable number.

399800180004 is an abundant number, since it is smaller than the sum of its proper divisors (533066906700).

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

399800180004 is a wasteful number, since it uses less digits than its factorization.

399800180004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33316681674 (or 33316681672 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

Adding to 399800180004 its reverse (400081008993), we get a palindrome (799881188997).

The spelling of 399800180004 in words is "three hundred ninety-nine billion, eight hundred million, one hundred eighty thousand, four".