1398016 has 36 divisors (see below), whose sum is σ = 2877952. Its totient is φ = 677376.

The previous prime is 1398011. The next prime is 1398017. The reversal of 1398016 is 6108931.

It is a happy number.

It is a nialpdrome in base 4.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10945 + ... + 11071.

2^1398016 is an apocalyptic number.

1398016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438976).

1398016 is an abundant number, since it is smaller than the sum of its proper divisors (1479936).

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

1398016 is an equidigital number, since it uses as much as digits as its factorization.

1398016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1398016 is about 1182.3772663579. The cubic root of 1398016 is about 111.8160244908.

Subtracting 1398016 from its reverse (6108931), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 1398016 in words is "one million, three hundred ninety-eight thousand, sixteen".