399673538468 has 12 divisors (see below), whose sum is σ = 699550393500. Its totient is φ = 199801997472.

The previous prime is 399673538461. The next prime is 399673538477. The reversal of 399673538468 is 864835376993.

It can be written as a sum of positive squares in 2 ways, for example, as 144892899904 + 254780638564 = 380648^2 + 504758^2 .

It is not an unprimeable number, because it can be changed into a prime (399673538461) 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, 8667071 + ... + 8713062.

It is an arithmetic number, because the mean of its divisors is an integer number (58295866125).

Almost surely, 2^399673538468 is an apocalyptic number.

It is an amenable number.

399673538468 is a deficient number, since it is larger than the sum of its proper divisors (299876855032).

399673538468 is a wasteful number, since it uses less digits than its factorization.

399673538468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17385886 (or 17385884 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 71.

The spelling of 399673538468 in words is "three hundred ninety-nine billion, six hundred seventy-three million, five hundred thirty-eight thousand, four hundred sixty-eight".