1999044 has 18 divisors (see below), whose sum is σ = 5053230. Its totient is φ = 666336.

The previous prime is 1999043. The next prime is 1999061. The reversal of 1999044 is 4409991.

1999044 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1077444 + 921600 = 1038^2 + 960^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 55529 = 1999044 / (1 + 9 + 9 + 9 + 0 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (1999043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27729 + ... + 27800.

It is an arithmetic number, because the mean of its divisors is an integer number (280735).

2^1999044 is an apocalyptic number.

It is an amenable number.

1999044 is an abundant number, since it is smaller than the sum of its proper divisors (3054186).

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

1999044 is a wasteful number, since it uses less digits than its factorization.

1999044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55539 (or 55534 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1999044 is about 1413.8755249314. The cubic root of 1999044 is about 125.9720270480.

The spelling of 1999044 in words is "one million, nine hundred ninety-nine thousand, forty-four".