1698444 has 36 divisors (see below), whose sum is σ = 4684680. Its totient is φ = 514560.

The previous prime is 1698427. The next prime is 1698449. The reversal of 1698444 is 4448961.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1698444² = 5769424042272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1698399 and 1698408.

It is not an unprimeable number, because it can be changed into a prime (1698449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1749 + ... + 2540.

It is an arithmetic number, because the mean of its divisors is an integer number (130130).

2^1698444 is an apocalyptic number.

It is an amenable number.

1698444 is an abundant number, since it is smaller than the sum of its proper divisors (2986236).

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

1698444 is a wasteful number, since it uses less digits than its factorization.

1698444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4305 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1698444 is about 1303.2436456780. The cubic root of 1698444 is about 119.3118951394.

The spelling of 1698444 in words is "one million, six hundred ninety-eight thousand, four hundred forty-four".