38229781 has 2 divisors, whose sum is σ = 38229782. Its totient is φ = 38229780.

The previous prime is 38229773. The next prime is 38229791. The reversal of 38229781 is 18792283.

38229781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 2588881 = 5970^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 38229781 - 2³ = 38229773 is a prime.

It is a super-2 number, since 2×38229781² = 2923032310615922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38229701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19114890 + 19114891.

It is an arithmetic number, because the mean of its divisors is an integer number (19114891).

Almost surely, 2^38229781 is an apocalyptic number.

It is an amenable number.

38229781 is a deficient number, since it is larger than the sum of its proper divisors (1).

38229781 is an equidigital number, since it uses as much as digits as its factorization.

38229781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 38229781 is about 6183.0236130877. The cubic root of 38229781 is about 336.8738267990.

The spelling of 38229781 in words is "thirty-eight million, two hundred twenty-nine thousand, seven hundred eighty-one".