40454443 has 4 divisors (see below), whose sum is σ = 41395288. Its totient is φ = 39513600.

The previous prime is 40454437. The next prime is 40454497. The reversal of 40454443 is 34445404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40454443 - 2¹³ = 40446251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40454243) 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, 470358 + ... + 470443.

It is an arithmetic number, because the mean of its divisors is an integer number (10348822).

Almost surely, 2^40454443 is an apocalyptic number.

40454443 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40454443 is a deficient number, since it is larger than the sum of its proper divisors (940845).

40454443 is an equidigital number, since it uses as much as digits as its factorization.

40454443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940844.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 40454443 is about 6360.3807275980. The cubic root of 40454443 is about 343.2854596480.

Adding to 40454443 its reverse (34445404), we get a palindrome (74899847).

The spelling of 40454443 in words is "forty million, four hundred fifty-four thousand, four hundred forty-three".