399067221944 has 16 divisors (see below), whose sum is σ = 755515615920. Its totient is φ = 197596391040.

The previous prime is 399067221907. The next prime is 399067221991. The reversal of 399067221944 is 449122760993.

It is a self number, because there is not a number n which added to its sum of digits gives 399067221944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242151617 + ... + 242153264.

It is an arithmetic number, because the mean of its divisors is an integer number (47219725995).

Almost surely, 2^399067221944 is an apocalyptic number.

It is an amenable number.

399067221944 is a deficient number, since it is larger than the sum of its proper divisors (356448393976).

399067221944 is a wasteful number, since it uses less digits than its factorization.

399067221944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484304990 (or 484304986 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 399067221944 in words is "three hundred ninety-nine billion, sixty-seven million, two hundred twenty-one thousand, nine hundred forty-four".