399733948394 has 16 divisors (see below), whose sum is σ = 654120718560. Its totient is φ = 181694298960.

The previous prime is 399733948391. The next prime is 399733948421. The reversal of 399733948394 is 493849337993.

It is not an unprimeable number, because it can be changed into a prime (399733948391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823237 + ... + 2030679.

It is an arithmetic number, because the mean of its divisors is an integer number (40882544910).

Almost surely, 2^399733948394 is an apocalyptic number.

399733948394 is a deficient number, since it is larger than the sum of its proper divisors (254386770166).

399733948394 is a wasteful number, since it uses less digits than its factorization.

399733948394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295045.

The product of its digits is 476171136, while the sum is 71.

The spelling of 399733948394 in words is "three hundred ninety-nine billion, seven hundred thirty-three million, nine hundred forty-eight thousand, three hundred ninety-four".