443990 has 16 divisors (see below), whose sum is σ = 827280. Its totient is φ = 171360.

The previous prime is 443987. The next prime is 443999. The reversal of 443990 is 99344.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (51705).

2⁴⁴³⁹⁹⁰ is an apocalyptic number.

443990 is a deficient number, since it is larger than the sum of its proper divisors (383290).

443990 is a wasteful number, since it uses less digits than its factorization.

443990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 443990 is about 666.3257461632. The cubic root of 443990 is about 76.2882635152.

The spelling of 443990 in words is "four hundred forty-three thousand, nine hundred ninety".