40490449 has 2 divisors, whose sum is σ = 40490450. Its totient is φ = 40490448.

The previous prime is 40490431. The next prime is 40490459. The reversal of 40490449 is 94409404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 294849 = 6340^2 + 543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40490449 is a prime.

It is not a weakly prime, because it can be changed into another prime (40490459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20245224 + 20245225.

It is an arithmetic number, because the mean of its divisors is an integer number (20245225).

Almost surely, 2^40490449 is an apocalyptic number.

It is an amenable number.

40490449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40490449 is an equidigital number, since it uses as much as digits as its factorization.

40490449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40490449 is about 6363.2105890030. The cubic root of 40490449 is about 343.3872751727.

The spelling of 40490449 in words is "forty million, four hundred ninety thousand, four hundred forty-nine".