1328840 has 32 divisors (see below), whose sum is σ = 3024000. Its totient is φ = 525504.

The previous prime is 1328827. The next prime is 1328843. The reversal of 1328840 is 488231.

It is not an unprimeable number, because it can be changed into a prime (1328843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5441 + ... + 5679.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2^1328840 is an apocalyptic number.

1328840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328840 is an abundant number, since it is smaller than the sum of its proper divisors (1695160).

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

1328840 is a wasteful number, since it uses less digits than its factorization.

1328840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1328840 is about 1152.7532259768. The cubic root of 1328840 is about 109.9404636502.

The spelling of 1328840 in words is "one million, three hundred twenty-eight thousand, eight hundred forty".