399319996140 has 144 divisors (see below), whose sum is σ = 1305362822400. Its totient is φ = 98225017344.

The previous prime is 399319996139. The next prime is 399319996183. The reversal of 399319996140 is 41699913993.

399319996140 is a `hidden beast` number, since 3 + 9 + 9 + 3 + 1 + 9 + 9 + 9 + 614 + 0 = 666.

It is a super-2 number, since 2×399319996140² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 3307966 + ... + 3426554.

It is an arithmetic number, because the mean of its divisors is an integer number (9065019600).

Almost surely, 2^399319996140 is an apocalyptic number.

399319996140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399319996140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652681411200).

399319996140 is an abundant number, since it is smaller than the sum of its proper divisors (906042826260).

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

399319996140 is a wasteful number, since it uses less digits than its factorization.

399319996140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120056 (or 120051 counting only the distinct ones).

The product of its (nonzero) digits is 12754584, while the sum is 63.

The spelling of 399319996140 in words is "three hundred ninety-nine billion, three hundred nineteen million, nine hundred ninety-six thousand, one hundred forty".