1398312 has 24 divisors (see below), whose sum is σ = 3787290. Its totient is φ = 466080.

The previous prime is 1398307. The next prime is 1398323. The reversal of 1398312 is 2138931.

It can be written as a sum of positive squares in only one way, i.e., 799236 + 599076 = 894^2 + 774^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9639 + ... + 9782.

2^1398312 is an apocalyptic number.

1398312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1398312 is an abundant number, since it is smaller than the sum of its proper divisors (2388978).

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

1398312 is a wasteful number, since it uses less digits than its factorization.

1398312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19433 (or 19426 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1398312 is about 1182.5024312871. The cubic root of 1398312 is about 111.8239154848.

The spelling of 1398312 in words is "one million, three hundred ninety-eight thousand, three hundred twelve".