1398306 has 48 divisors (see below), whose sum is σ = 3478464. Its totient is φ = 366912.

The previous prime is 1398289. The next prime is 1398307. The reversal of 1398306 is 6038931.

It is not an unprimeable number, because it can be changed into a prime (1398307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7000 + ... + 7196.

It is an arithmetic number, because the mean of its divisors is an integer number (72468).

2^1398306 is an apocalyptic number.

It is a pronic number, being equal to 1182×1183.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739232).

1398306 is an abundant number, since it is smaller than the sum of its proper divisors (2080158).

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

1398306 is a wasteful number, since it uses less digits than its factorization.

1398306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1398306 is about 1182.4998942918. The cubic root of 1398306 is about 111.8237555433.

The spelling of 1398306 in words is "one million, three hundred ninety-eight thousand, three hundred six".