1340688 has 80 divisors (see below), whose sum is σ = 3856896. Its totient is φ = 399360.

The previous prime is 1340687. The next prime is 1340701. The reversal of 1340688 is 8860431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25270 + ... + 25322.

2^1340688 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 1340688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928448).

1340688 is an abundant number, since it is smaller than the sum of its proper divisors (2516208).

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

1340688 is a wasteful number, since it uses less digits than its factorization.

1340688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1340688 is about 1157.8808228829. The cubic root of 1340688 is about 110.2662421245.

The spelling of 1340688 in words is "one million, three hundred forty thousand, six hundred eighty-eight".