1919040 has 56 divisors (see below), whose sum is σ = 6096000. Its totient is φ = 511488.

The previous prime is 1919039. The next prime is 1919041. The reversal of 1919040 is 409191.

It is an interprime number because it is at equal distance from previous prime (1919039) and next prime (1919041).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1919040.

It is not an unprimeable number, because it can be changed into a prime (1919041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 1959.

2^1919040 is an apocalyptic number.

1919040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048000).

1919040 is an abundant number, since it is smaller than the sum of its proper divisors (4176960).

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

1919040 is a wasteful number, since it uses less digits than its factorization.

1919040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1919040 is about 1385.2941925815. The cubic root of 1919040 is about 124.2685819013.

The spelling of 1919040 in words is "one million, nine hundred nineteen thousand, forty".