38784075381 has 12 divisors (see below), whose sum is σ = 58457157408. Its totient is φ = 24731874024.

The previous prime is 38784075241. The next prime is 38784075401. The reversal of 38784075381 is 18357048783.

38784075381 is a `hidden beast` number, since 38 + 78 + 4 + 0 + 7 + 538 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-38784075381 is a prime.

It is a super-2 number, since 2×38784075381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38784075581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93681135 + ... + 93681548.

It is an arithmetic number, because the mean of its divisors is an integer number (4871429784).

Almost surely, 2^38784075381 is an apocalyptic number.

It is an amenable number.

38784075381 is a deficient number, since it is larger than the sum of its proper divisors (19673082027).

38784075381 is a wasteful number, since it uses less digits than its factorization.

38784075381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187362712 (or 187362709 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 38784075381 in words is "thirty-eight billion, seven hundred eighty-four million, seventy-five thousand, three hundred eighty-one".