38779297784 has 16 divisors (see below), whose sum is σ = 73112905320. Its totient is φ = 19282523040.

The previous prime is 38779297741. The next prime is 38779297819. The reversal of 38779297784 is 48779297783.

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, 13389194 + ... + 13392089.

Almost surely, 2^38779297784 is an apocalyptic number.

It is an amenable number.

38779297784 is a deficient number, since it is larger than the sum of its proper divisors (34333607536).

38779297784 is a wasteful number, since it uses less digits than its factorization.

38779297784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26781470 (or 26781466 counting only the distinct ones).

The product of its digits is 298722816, while the sum is 71.

Subtracting 38779297784 from its reverse (48779297783), we obtain a palindrome (9999999999).

The spelling of 38779297784 in words is "thirty-eight billion, seven hundred seventy-nine million, two hundred ninety-seven thousand, seven hundred eighty-four".