1398958 has 8 divisors (see below), whose sum is σ = 2289240. Its totient is φ = 635880.

The previous prime is 1398911. The next prime is 1398967. The reversal of 1398958 is 8598931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31773 + ... + 31816.

It is an arithmetic number, because the mean of its divisors is an integer number (286155).

2^1398958 is an apocalyptic number.

1398958 is a deficient number, since it is larger than the sum of its proper divisors (890282).

1398958 is a wasteful number, since it uses less digits than its factorization.

1398958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63602.

The product of its digits is 77760, while the sum is 43.

The square root of 1398958 is about 1182.7755492907. The cubic root of 1398958 is about 111.8411331797.

The spelling of 1398958 in words is "one million, three hundred ninety-eight thousand, nine hundred fifty-eight".