1530840 has 32 divisors (see below), whose sum is σ = 4592880. Its totient is φ = 408192.

The previous prime is 1530839. The next prime is 1530847. The reversal of 1530840 is 480351.

It is a super-2 number, since 2×1530840² = 4686942211200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6259 + ... + 6498.

2^1530840 is an apocalyptic number.

1530840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530840 is an abundant number, since it is smaller than the sum of its proper divisors (3062040).

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

1530840 is a wasteful number, since it uses less digits than its factorization.

1530840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12771 (or 12767 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1530840 is about 1237.2711909683. The cubic root of 1530840 is about 115.2506191512.

The spelling of 1530840 in words is "one million, five hundred thirty thousand, eight hundred forty".