990441 has 8 divisors (see below), whose sum is σ = 1467360. Its totient is φ = 660276.

The previous prime is 990397. The next prime is 990463. The reversal of 990441 is 144099.

It is not a de Polignac number, because 990441 - 2⁶ = 990377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 36683 = 990441 / (9 + 9 + 0 + 4 + 4 + 1).

It is not an unprimeable number, because it can be changed into a prime (990841) 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, 18315 + ... + 18368.

It is an arithmetic number, because the mean of its divisors is an integer number (183420).

2⁹⁹⁰⁴⁴¹ is an apocalyptic number.

It is an amenable number.

990441 is a deficient number, since it is larger than the sum of its proper divisors (476919).

990441 is a wasteful number, since it uses less digits than its factorization.

990441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36692 (or 36686 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 990441 is about 995.2090232710. The cubic root of 990441 is about 99.6803459684.

It can be divided in two parts, 990 and 441, that added together give a triangular number (1431 = T₅₃).

The spelling of 990441 in words is "nine hundred ninety thousand, four hundred forty-one".