40656449 has 4 divisors (see below), whose sum is σ = 40883760. Its totient is φ = 40429140.

The previous prime is 40656443. The next prime is 40656491. The reversal of 40656449 is 94465604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40656449 - 2⁸ = 40656193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40656443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113387 + ... + 113744.

It is an arithmetic number, because the mean of its divisors is an integer number (10220940).

Almost surely, 2^40656449 is an apocalyptic number.

It is an amenable number.

40656449 is a deficient number, since it is larger than the sum of its proper divisors (227311).

40656449 is a wasteful number, since it uses less digits than its factorization.

40656449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227310.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 40656449 is about 6376.2409772530. The cubic root of 40656449 is about 343.8559006386.

The spelling of 40656449 in words is "forty million, six hundred fifty-six thousand, four hundred forty-nine".