40647449 has 8 divisors (see below), whose sum is σ = 41532480. Its totient is φ = 39766896.

The previous prime is 40647443. The next prime is 40647469. The reversal of 40647449 is 94474604.

It is a happy number.

40647449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40647449 - 2⁸ = 40647193 is a prime.

It is a super-2 number, since 2×40647449² = 3304430220415202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40647443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22394 + ... + 24140.

It is an arithmetic number, because the mean of its divisors is an integer number (5191560).

Almost surely, 2^40647449 is an apocalyptic number.

It is an amenable number.

40647449 is a deficient number, since it is larger than the sum of its proper divisors (885031).

40647449 is a wasteful number, since it uses less digits than its factorization.

40647449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 40647449 is about 6375.5351932210. The cubic root of 40647449 is about 343.8305259722.

The spelling of 40647449 in words is "forty million, six hundred forty-seven thousand, four hundred forty-nine".