440605993 has 8 divisors (see below), whose sum is σ = 451202400. Its totient is φ = 430025568.

The previous prime is 440605987. The next prime is 440605999. The reversal of 440605993 is 399506044.

It is an interprime number because it is at equal distance from previous prime (440605987) and next prime (440605999).

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 440605993 - 2¹⁷ = 440474921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440605999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66453 + ... + 72781.

It is an arithmetic number, because the mean of its divisors is an integer number (56400300).

Almost surely, 2^440605993 is an apocalyptic number.

440605993 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

440605993 is a deficient number, since it is larger than the sum of its proper divisors (10596407).

440605993 is a wasteful number, since it uses less digits than its factorization.

440605993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 440605993 is about 20990.6167846493. The cubic root of 440605993 is about 760.9395081201.

The spelling of 440605993 in words is "four hundred forty million, six hundred five thousand, nine hundred ninety-three".