1398938 has 4 divisors (see below), whose sum is σ = 2098410. Its totient is φ = 699468.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398938 is 8398931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 182329 = 1103^2 + 427^2 .

It is an Ulam number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1398895 and 1398904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349733 + ... + 349736.

2^1398938 is an apocalyptic number.

1398938 is a deficient number, since it is larger than the sum of its proper divisors (699472).

1398938 is an equidigital number, since it uses as much as digits as its factorization.

1398938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699471.

The product of its digits is 46656, while the sum is 41.

The square root of 1398938 is about 1182.7670945710. The cubic root of 1398938 is about 111.8406002036.

The spelling of 1398938 in words is "one million, three hundred ninety-eight thousand, nine hundred thirty-eight".