40443965 has 8 divisors (see below), whose sum is σ = 48653880. Its totient is φ = 32274432.

The previous prime is 40443937. The next prime is 40444007. The reversal of 40443965 is 56934404.

It can be written as a sum of positive squares in 4 ways, for example, as 11002489 + 29441476 = 3317^2 + 5426^2 .

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 40443965 - 2⁸ = 40443709 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7844 + ... + 11933.

It is an arithmetic number, because the mean of its divisors is an integer number (6081735).

Almost surely, 2^40443965 is an apocalyptic number.

It is an amenable number.

40443965 is a deficient number, since it is larger than the sum of its proper divisors (8209915).

40443965 is a wasteful number, since it uses less digits than its factorization.

40443965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20191.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 40443965 is about 6359.5569814257. The cubic root of 40443965 is about 343.2558192644.

The spelling of 40443965 in words is "forty million, four hundred forty-three thousand, nine hundred sixty-five".