1920540 has 24 divisors (see below), whose sum is σ = 5377680. Its totient is φ = 512128.

The previous prime is 1920533. The next prime is 1920551. The reversal of 1920540 is 450291.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15945 + ... + 16064.

It is an arithmetic number, because the mean of its divisors is an integer number (224070).

2^1920540 is an apocalyptic number.

1920540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920540 is an abundant number, since it is smaller than the sum of its proper divisors (3457140).

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

1920540 is a wasteful number, since it uses less digits than its factorization.

1920540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32021 (or 32019 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1920540 is about 1385.8354880721. The cubic root of 1920540 is about 124.3009512678.

The spelling of 1920540 in words is "one million, nine hundred twenty thousand, five hundred forty".