990481 has 8 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 945120.

The previous prime is 990469. The next prime is 990487. The reversal of 990481 is 184099.

990481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990481 is a prime.

It is a super-2 number, since 2×990481² = 1962105222722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (990487) 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, 2580 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (129600).

2⁹⁹⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

990481 is a deficient number, since it is larger than the sum of its proper divisors (46319).

990481 is a wasteful number, since it uses less digits than its factorization.

990481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 990481 is about 995.2291193489. The cubic root of 990481 is about 99.6816878488.

The spelling of 990481 in words is "nine hundred ninety thousand, four hundred eighty-one".