38788381 has 2 divisors, whose sum is σ = 38788382. Its totient is φ = 38788380.

The previous prime is 38788369. The next prime is 38788391. The reversal of 38788381 is 18388783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32387481 + 6400900 = 5691^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 38788381 - 2¹⁷ = 38657309 is a prime.

It is a super-2 number, since 2×38788381² = 3009077001202322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38788391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19394190 + 19394191.

It is an arithmetic number, because the mean of its divisors is an integer number (19394191).

Almost surely, 2^38788381 is an apocalyptic number.

It is an amenable number.

38788381 is a deficient number, since it is larger than the sum of its proper divisors (1).

38788381 is an equidigital number, since it uses as much as digits as its factorization.

38788381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 38788381 is about 6228.0318721086. The cubic root of 38788381 is about 338.5066599319.

The spelling of 38788381 in words is "thirty-eight million, seven hundred eighty-eight thousand, three hundred eighty-one".