1398444 has 12 divisors (see below), whose sum is σ = 3263064. Its totient is φ = 466144.

The previous prime is 1398427. The next prime is 1398451. The reversal of 1398444 is 4448931.

It is a happy number.

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

It is a super-2 number, since 2×1398444² = 3911291242272, which contains 22 as substring.

It is a plaindrome in base 16.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 58257 + ... + 58280.

It is an arithmetic number, because the mean of its divisors is an integer number (271922).

2^1398444 is an apocalyptic number.

It is an amenable number.

1398444 is an abundant number, since it is smaller than the sum of its proper divisors (1864620).

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

1398444 is a wasteful number, since it uses less digits than its factorization.

1398444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116544 (or 116542 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 1398444 is about 1182.5582438087. The cubic root of 1398444 is about 111.8274340826.

It can be divided in two parts, 13984 and 44, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1398444 in words is "one million, three hundred ninety-eight thousand, four hundred forty-four".