4038399718929 has 9 divisors (see below), whose sum is σ = 5833252746633. Its totient is φ = 2692262460132.

The previous prime is 4038399718877. The next prime is 4038399718937. The reversal of 4038399718929 is 9298179938304.

The square root of 4038399718929 is 2009577.

It is a perfect power (a square), and thus also a powerful number.

4038399718929 is a `hidden beast` number, since 4 + 0 + 38 + 399 + 7 + 189 + 29 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-4038399718929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4038399714929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5693802 + ... + 6363660.

Almost surely, 2^{4038399718929} is an apocalyptic number.

4038399718929 is the 2009577-th square number.

4038399718929 is the 1004789-th centered octagonal number.

It is an amenable number.

4038399718929 is a deficient number, since it is larger than the sum of its proper divisors (1794853027704).

4038399718929 is an frugal number, since it uses more digits than its factorization.

4038399718929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339724 (or 669862 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 72.

The spelling of 4038399718929 in words is "four trillion, thirty-eight billion, three hundred ninety-nine million, seven hundred eighteen thousand, nine hundred twenty-nine".