43920449 has 4 divisors (see below), whose sum is σ = 43948464. Its totient is φ = 43892436.

The previous prime is 43920439. The next prime is 43920463. The reversal of 43920449 is 94402934.

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 43920449 - 2⁴ = 43920433 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 (43920439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11507 + ... + 14840.

It is an arithmetic number, because the mean of its divisors is an integer number (10987116).

Almost surely, 2^43920449 is an apocalyptic number.

It is an amenable number.

43920449 is a deficient number, since it is larger than the sum of its proper divisors (28015).

43920449 is a wasteful number, since it uses less digits than its factorization.

43920449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28014.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 43920449 is about 6627.2504856841. The cubic root of 43920449 is about 352.8219455303.

The spelling of 43920449 in words is "forty-three million, nine hundred twenty thousand, four hundred forty-nine".