1024840 has 16 divisors (see below), whose sum is σ = 2305980. Its totient is φ = 409920.

The previous prime is 1024823. The next prime is 1024843. The reversal of 1024840 is 484201.

1024840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 964324 + 60516 = 982^2 + 246^2 .

It is not an unprimeable number, because it can be changed into a prime (1024843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12771 + ... + 12850.

2^1024840 is an apocalyptic number.

1024840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1024840 is an abundant number, since it is smaller than the sum of its proper divisors (1281140).

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

1024840 is a wasteful number, since it uses less digits than its factorization.

1024840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25632 (or 25628 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1024840 is about 1012.3438151142. The cubic root of 1024840 is about 100.8212372318.

The spelling of 1024840 in words is "one million, twenty-four thousand, eight hundred forty".