40288649 has 2 divisors, whose sum is σ = 40288650. Its totient is φ = 40288648.

The previous prime is 40288643. The next prime is 40288673. The reversal of 40288649 is 94688204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 283024 = 6325^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 40288649 - 2⁸ = 40288393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40288643) 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, 20144324 + 20144325.

It is an arithmetic number, because the mean of its divisors is an integer number (20144325).

Almost surely, 2^40288649 is an apocalyptic number.

It is an amenable number.

40288649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40288649 is an equidigital number, since it uses as much as digits as its factorization.

40288649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 40288649 is about 6347.3340072821. The cubic root of 40288649 is about 342.8158565282.

The spelling of 40288649 in words is "forty million, two hundred eighty-eight thousand, six hundred forty-nine".