1990104 has 32 divisors (see below), whose sum is σ = 5030640. Its totient is φ = 656000.

The previous prime is 1990103. The next prime is 1990111. The reversal of 1990104 is 4010991.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990103) 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, 2014 + ... + 2834.

2^1990104 is an apocalyptic number.

It is an amenable number.

1990104 is an abundant number, since it is smaller than the sum of its proper divisors (3040536).

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

1990104 is a wasteful number, since it uses less digits than its factorization.

1990104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1990104 is about 1410.7104593076. The cubic root of 1990104 is about 125.7839583293.

The spelling of 1990104 in words is "one million, nine hundred ninety thousand, one hundred four".