40328569 has 2 divisors, whose sum is σ = 40328570. Its totient is φ = 40328568.

The previous prime is 40328567. The next prime is 40328581. The reversal of 40328569 is 96582304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28515600 + 11812969 = 5340^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 40328569 - 2¹ = 40328567 is a prime.

It is a super-2 number, since 2×40328569² = 3252786955175522, which contains 22 as substring.

Together with 40328567, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40328567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20164284 + 20164285.

It is an arithmetic number, because the mean of its divisors is an integer number (20164285).

Almost surely, 2^40328569 is an apocalyptic number.

It is an amenable number.

40328569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40328569 is an equidigital number, since it uses as much as digits as its factorization.

40328569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 40328569 is about 6350.4778560357. The cubic root of 40328569 is about 342.9290454936.

The spelling of 40328569 in words is "forty million, three hundred twenty-eight thousand, five hundred sixty-nine".