1398224 has 20 divisors (see below), whose sum is σ = 2797440. Its totient is φ = 676320.

The previous prime is 1398217. The next prime is 1398227. The reversal of 1398224 is 4228931.

1398224 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398227) 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, 914 + ... + 1905.

It is an arithmetic number, because the mean of its divisors is an integer number (139872).

2^1398224 is an apocalyptic number.

It is an amenable number.

1398224 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1398224 is a wasteful number, since it uses less digits than its factorization.

1398224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2852 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1398224 is about 1182.4652214759. The cubic root of 1398224 is about 111.8215696300.

The spelling of 1398224 in words is "one million, three hundred ninety-eight thousand, two hundred twenty-four".