1690044 has 12 divisors (see below), whose sum is σ = 3943464. Its totient is φ = 563344.

The previous prime is 1690043. The next prime is 1690057. The reversal of 1690044 is 4400961.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1689996 and 1690023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70407 + ... + 70430.

It is an arithmetic number, because the mean of its divisors is an integer number (328622).

2^1690044 is an apocalyptic number.

It is an amenable number.

1690044 is an abundant number, since it is smaller than the sum of its proper divisors (2253420).

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

1690044 is a wasteful number, since it uses less digits than its factorization.

1690044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140844 (or 140842 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1690044 is about 1300.0169229668. The cubic root of 1690044 is about 119.1148762403.

The spelling of 1690044 in words is "one million, six hundred ninety thousand, forty-four".