1340780 has 48 divisors (see below), whose sum is σ = 3291456. Its totient is φ = 449280.

The previous prime is 1340777. The next prime is 1340789. The reversal of 1340780 is 870431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8462 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (68572).

2^1340780 is an apocalyptic number.

1340780 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 1340780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645728).

1340780 is an abundant number, since it is smaller than the sum of its proper divisors (1950676).

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

1340780 is a wasteful number, since it uses less digits than its factorization.

1340780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1340780 is about 1157.9205499515. The cubic root of 1340780 is about 110.2687642779.

The spelling of 1340780 in words is "one million, three hundred forty thousand, seven hundred eighty".