1398646 has 4 divisors (see below), whose sum is σ = 2097972. Its totient is φ = 699322.

The previous prime is 1398623. The next prime is 1398659. The reversal of 1398646 is 6468931.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349660 + ... + 349663.

It is an arithmetic number, because the mean of its divisors is an integer number (524493).

2^1398646 is an apocalyptic number.

1398646 is a deficient number, since it is larger than the sum of its proper divisors (699326).

1398646 is an equidigital number, since it uses as much as digits as its factorization.

1398646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699325.

The product of its digits is 31104, while the sum is 37.

The square root of 1398646 is about 1182.6436487801. The cubic root of 1398646 is about 111.8328181748.

The spelling of 1398646 in words is "one million, three hundred ninety-eight thousand, six hundred forty-six".