39228689 has 2 divisors, whose sum is σ = 39228690. Its totient is φ = 39228688.

The previous prime is 39228659. The next prime is 39228727. The reversal of 39228689 is 98682293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 577600 = 6217^2 + 760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39228689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39228659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19614344 + 19614345.

It is an arithmetic number, because the mean of its divisors is an integer number (19614345).

Almost surely, 2^39228689 is an apocalyptic number.

It is an amenable number.

39228689 is a deficient number, since it is larger than the sum of its proper divisors (1).

39228689 is an equidigital number, since it uses as much as digits as its factorization.

39228689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 39228689 is about 6263.2810091836. The cubic root of 39228689 is about 339.7827014049.

The spelling of 39228689 in words is "thirty-nine million, two hundred twenty-eight thousand, six hundred eighty-nine".