1398418 has 16 divisors (see below), whose sum is σ = 2439360. Its totient is φ = 588816.

The previous prime is 1398413. The next prime is 1398421. The reversal of 1398418 is 8148931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1398413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 1672.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2^1398418 is an apocalyptic number.

1398418 is a deficient number, since it is larger than the sum of its proper divisors (1040942).

1398418 is a wasteful number, since it uses less digits than its factorization.

1398418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its digits is 6912, while the sum is 34.

The square root of 1398418 is about 1182.5472506416. The cubic root of 1398418 is about 111.8267410430.

The spelling of 1398418 in words is "one million, three hundred ninety-eight thousand, four hundred eighteen".