399960109827 has 8 divisors (see below), whose sum is σ = 592533496080. Its totient is φ = 266640073200.

The previous prime is 399960109817. The next prime is 399960109841. The reversal of 399960109827 is 728901069993.

It is a happy number.

399960109827 is a `hidden beast` number, since 399 + 9 + 60 + 109 + 82 + 7 = 666.

It is not a de Polignac number, because 399960109827 - 2⁷ = 399960109699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399960109807) 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 7 ways as a sum of consecutive naturals, for example, 7406668674 + ... + 7406668727.

It is an arithmetic number, because the mean of its divisors is an integer number (74066687010).

Almost surely, 2^399960109827 is an apocalyptic number.

399960109827 is a deficient number, since it is larger than the sum of its proper divisors (192573386253).

399960109827 is a wasteful number, since it uses less digits than its factorization.

399960109827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14813337410 (or 14813337404 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 399960109827 in words is "three hundred ninety-nine billion, nine hundred sixty million, one hundred nine thousand, eight hundred twenty-seven".