1990584 has 24 divisors (see below), whose sum is σ = 5391360. Its totient is φ = 663504.

The previous prime is 1990579. The next prime is 1990607. The reversal of 1990584 is 4850991.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1990584² = 7924849322112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13752 + ... + 13895.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

2^1990584 is an apocalyptic number.

It is an amenable number.

1990584 is an abundant number, since it is smaller than the sum of its proper divisors (3400776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1990584 is a wasteful number, since it uses less digits than its factorization.

1990584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27659 (or 27652 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1990584 is about 1410.8805760942. The cubic root of 1990584 is about 125.7940702710.

The spelling of 1990584 in words is "one million, nine hundred ninety thousand, five hundred eighty-four".