1368664 has 32 divisors (see below), whose sum is σ = 2845440. Its totient is φ = 612000.

The previous prime is 1368659. The next prime is 1368673. The reversal of 1368664 is 4668631.

It is a super-2 number, since 2×1368664² = 3746482289792, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8989 + ... + 9139.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^1368664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1368664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422720).

1368664 is an abundant number, since it is smaller than the sum of its proper divisors (1476776).

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

1368664 is a wasteful number, since it uses less digits than its factorization.

1368664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 267 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 1368664 is about 1169.8991409519. The cubic root of 1368664 is about 111.0279398325.

The spelling of 1368664 in words is "one million, three hundred sixty-eight thousand, six hundred sixty-four".