38312499447 has 8 divisors (see below), whose sum is σ = 56759258480. Its totient is φ = 25541666280.

The previous prime is 38312499443. The next prime is 38312499493. The reversal of 38312499447 is 74499421383.

It is not a de Polignac number, because 38312499447 - 2² = 38312499443 is a prime.

It is a super-2 number, since 2×38312499447² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38312499393 and 38312499402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38312499443) 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, 709490704 + ... + 709490757.

It is an arithmetic number, because the mean of its divisors is an integer number (7094907310).

Almost surely, 2^38312499447 is an apocalyptic number.

38312499447 is a deficient number, since it is larger than the sum of its proper divisors (18446759033).

38312499447 is a wasteful number, since it uses less digits than its factorization.

38312499447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418981470 (or 1418981464 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 38312499447 in words is "thirty-eight billion, three hundred twelve million, four hundred ninety-nine thousand, four hundred forty-seven".