1398018 has 16 divisors (see below), whose sum is σ = 2864736. Its totient is φ = 454560.

The previous prime is 1398017. The next prime is 1398031. The reversal of 1398018 is 8108931.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1398011) 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, 2596 + ... + 3087.

It is an arithmetic number, because the mean of its divisors is an integer number (179046).

2^1398018 is an apocalyptic number.

1398018 is an abundant number, since it is smaller than the sum of its proper divisors (1466718).

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

1398018 is a wasteful number, since it uses less digits than its factorization.

1398018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1398018 is about 1182.3781121113. The cubic root of 1398018 is about 111.8160778121.

The spelling of 1398018 in words is "one million, three hundred ninety-eight thousand, eighteen".