38400038965 has 8 divisors (see below), whose sum is σ = 46089342648. Its totient is φ = 30713833920.

The previous prime is 38400038867. The next prime is 38400038969. The reversal of 38400038965 is 56983000483.

It can be written as a sum of positive squares in 4 ways, for example, as 5855157361 + 32544881604 = 76519^2 + 180402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-38400038965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38400038969) 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, 747306 + ... + 797035.

It is an arithmetic number, because the mean of its divisors is an integer number (5761167831).

Almost surely, 2^38400038965 is an apocalyptic number.

It is an amenable number.

38400038965 is a deficient number, since it is larger than the sum of its proper divisors (7689303683).

38400038965 is a wasteful number, since it uses less digits than its factorization.

38400038965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549319.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 38400038965 in words is "thirty-eight billion, four hundred million, thirty-eight thousand, nine hundred sixty-five".