40904449 has 4 divisors (see below), whose sum is σ = 41480640. Its totient is φ = 40328260.

The previous prime is 40904441. The next prime is 40904453. The reversal of 40904449 is 94440904.

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 40904449 - 2³ = 40904441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40904441) 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, 287989 + ... + 288130.

It is an arithmetic number, because the mean of its divisors is an integer number (10370160).

Almost surely, 2^40904449 is an apocalyptic number.

It is an amenable number.

40904449 is a deficient number, since it is larger than the sum of its proper divisors (576191).

40904449 is an equidigital number, since it uses as much as digits as its factorization.

40904449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576190.

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

The square root of 40904449 is about 6395.6586056481. The cubic root of 40904449 is about 344.5536452657.

The spelling of 40904449 in words is "forty million, nine hundred four thousand, four hundred forty-nine".