38644873 has 2 divisors, whose sum is σ = 38644874. Its totient is φ = 38644872.

The previous prime is 38644867. The next prime is 38644877. The reversal of 38644873 is 37844683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38402809 + 242064 = 6197^2 + 492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38644873 is a prime.

It is a super-2 number, since 2×38644873² = 2986852418372258, which contains 22 as substring.

It is the 6217-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (38644877) by changing a digit.

It is a nontrivial repunit in base 6216.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19322436 + 19322437.

It is an arithmetic number, because the mean of its divisors is an integer number (19322437).

Almost surely, 2^38644873 is an apocalyptic number.

It is an amenable number.

38644873 is a deficient number, since it is larger than the sum of its proper divisors (1).

38644873 is an equidigital number, since it uses as much as digits as its factorization.

38644873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 43.

The square root of 38644873 is about 6216.5000603233. The cubic root of 38644873 is about 338.0886786915.

The spelling of 38644873 in words is "thirty-eight million, six hundred forty-four thousand, eight hundred seventy-three".