399938423427 has 16 divisors (see below), whose sum is σ = 592841760160. Its totient is φ = 266472439200.

The previous prime is 399938423419. The next prime is 399938423429. The reversal of 399938423427 is 724324839993.

399938423427 is a `hidden beast` number, since 399 + 9 + 3 + 8 + 4 + 234 + 2 + 7 = 666.

It is not a de Polignac number, because 399938423427 - 2³ = 399938423419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399938423429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4207024 + ... + 4301037.

It is an arithmetic number, because the mean of its divisors is an integer number (37052610010).

Almost surely, 2^399938423427 is an apocalyptic number.

399938423427 is a deficient number, since it is larger than the sum of its proper divisors (192903336733).

399938423427 is a wasteful number, since it uses less digits than its factorization.

399938423427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509811 (or 8509805 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 399938423427 in words is "three hundred ninety-nine billion, nine hundred thirty-eight million, four hundred twenty-three thousand, four hundred twenty-seven".