38624389 has 2 divisors, whose sum is σ = 38624390. Its totient is φ = 38624388.

The previous prime is 38624381. The next prime is 38624413. The reversal of 38624389 is 98342683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 3932289 = 5890^2 + 1983^2 .

It is a cyclic number.

It is not a de Polignac number, because 38624389 - 2³ = 38624381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38624381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19312194 + 19312195.

It is an arithmetic number, because the mean of its divisors is an integer number (19312195).

Almost surely, 2^38624389 is an apocalyptic number.

It is an amenable number.

38624389 is a deficient number, since it is larger than the sum of its proper divisors (1).

38624389 is an equidigital number, since it uses as much as digits as its factorization.

38624389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 38624389 is about 6214.8522910846. The cubic root of 38624389 is about 338.0289326680.

The spelling of 38624389 in words is "thirty-eight million, six hundred twenty-four thousand, three hundred eighty-nine".