1340040 has 64 divisors (see below), whose sum is σ = 4334400. Its totient is φ = 329472.

The previous prime is 1340039. The next prime is 1340041. The reversal of 1340040 is 400431.

It is an interprime number because it is at equal distance from previous prime (1340039) and next prime (1340041).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1339998 and 1340025.

It is not an unprimeable number, because it can be changed into a prime (1340041) 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, 1131 + ... + 1989.

It is an arithmetic number, because the mean of its divisors is an integer number (67725).

2^1340040 is an apocalyptic number.

1340040 is a gapful number since it is divisible by the number (10) 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 1340040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2167200).

1340040 is an abundant number, since it is smaller than the sum of its proper divisors (2994360).

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

1340040 is a wasteful number, since it uses less digits than its factorization.

1340040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1340040 is about 1157.6009675186. The cubic root of 1340040 is about 110.2484741229.

Adding to 1340040 its reverse (400431), we get a palindrome (1740471).

The spelling of 1340040 in words is "one million, three hundred forty thousand, forty".