1378398 has 32 divisors (see below), whose sum is σ = 3239424. Its totient is φ = 382752.

The previous prime is 1378397. The next prime is 1378427. The reversal of 1378398 is 8938731.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (101232).

2^1378398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619712).

1378398 is an abundant number, since it is smaller than the sum of its proper divisors (1861026).

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

1378398 is a wasteful number, since it uses less digits than its factorization.

1378398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its digits is 36288, while the sum is 39.

The square root of 1378398 is about 1174.0519579644. The cubic root of 1378398 is about 111.2905301973.

The spelling of 1378398 in words is "one million, three hundred seventy-eight thousand, three hundred ninety-eight".