39628669 has 2 divisors, whose sum is σ = 39628670. Its totient is φ = 39628668.

The previous prime is 39628643. The next prime is 39628697. The reversal of 39628669 is 96682693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 416025 = 6262^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 39628669 - 2⁵ = 39628637 is a prime.

It is a super-2 number, since 2×39628669² = 3140862813423122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39628469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19814334 + 19814335.

It is an arithmetic number, because the mean of its divisors is an integer number (19814335).

Almost surely, 2^39628669 is an apocalyptic number.

It is an amenable number.

39628669 is a deficient number, since it is larger than the sum of its proper divisors (1).

39628669 is an equidigital number, since it uses as much as digits as its factorization.

39628669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 49.

The square root of 39628669 is about 6295.1305784710. The cubic root of 39628669 is about 340.9336191138.

The spelling of 39628669 in words is "thirty-nine million, six hundred twenty-eight thousand, six hundred sixty-nine".