1398138 has 16 divisors (see below), whose sum is σ = 3195840. Its totient is φ = 399456.

The previous prime is 1398127. The next prime is 1398139. The reversal of 1398138 is 8318931.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1398099 and 1398108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398139) 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, 16603 + ... + 16686.

It is an arithmetic number, because the mean of its divisors is an integer number (199740).

2^1398138 is an apocalyptic number.

1398138 is an abundant number, since it is smaller than the sum of its proper divisors (1797702).

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

1398138 is a wasteful number, since it uses less digits than its factorization.

1398138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33301.

The product of its digits is 5184, while the sum is 33.

The square root of 1398138 is about 1182.4288562108. The cubic root of 1398138 is about 111.8192769949.

The spelling of 1398138 in words is "one million, three hundred ninety-eight thousand, one hundred thirty-eight".