38644369 has 2 divisors, whose sum is σ = 38644370. Its totient is φ = 38644368.

The previous prime is 38644357. The next prime is 38644379. The reversal of 38644369 is 96344683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 17114769 = 4640^2 + 4137^2 .

It is a cyclic number.

It is not a de Polignac number, because 38644369 - 2⁵ = 38644337 is a prime.

It is a super-2 number, since 2×38644369² = 2986774510816322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38644379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19322184 + 19322185.

It is an arithmetic number, because the mean of its divisors is an integer number (19322185).

Almost surely, 2^38644369 is an apocalyptic number.

It is an amenable number.

38644369 is a deficient number, since it is larger than the sum of its proper divisors (1).

38644369 is an equidigital number, since it uses as much as digits as its factorization.

38644369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 43.

The square root of 38644369 is about 6216.4595229117. The cubic root of 38644369 is about 338.0872089197.

The spelling of 38644369 in words is "thirty-eight million, six hundred forty-four thousand, three hundred sixty-nine".