1078840 has 32 divisors (see below), whose sum is σ = 2774880. Its totient is φ = 369792.

The previous prime is 1078817. The next prime is 1078841. The reversal of 1078840 is 488701.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1078799 and 1078808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078841) 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, 1647 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (86715).

2^1078840 is an apocalyptic number.

1078840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1078840 is an abundant number, since it is smaller than the sum of its proper divisors (1696040).

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

1078840 is a wasteful number, since it uses less digits than its factorization.

1078840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871 (or 3867 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1078840 is about 1038.6722293390. The cubic root of 1078840 is about 102.5618108249.

The spelling of 1078840 in words is "one million, seventy-eight thousand, eight hundred forty".