40396289 has 2 divisors, whose sum is σ = 40396290. Its totient is φ = 40396288.

The previous prime is 40396277. The next prime is 40396331. The reversal of 40396289 is 98269304.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 11505664 = 5375^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 40396289 - 2¹² = 40392193 is a prime.

It is not a weakly prime, because it can be changed into another prime (40396219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20198144 + 20198145.

It is an arithmetic number, because the mean of its divisors is an integer number (20198145).

Almost surely, 2^40396289 is an apocalyptic number.

It is an amenable number.

40396289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40396289 is an equidigital number, since it uses as much as digits as its factorization.

40396289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 40396289 is about 6355.8075018049. The cubic root of 40396289 is about 343.1208877270.

The spelling of 40396289 in words is "forty million, three hundred ninety-six thousand, two hundred eighty-nine".