2019240 has 96 divisors (see below), whose sum is σ = 6739200. Its totient is φ = 524160.

The previous prime is 2019223. The next prime is 2019257. The reversal of 2019240 is 429102.

It is a Cunningham number, because it is equal to 1421²-1.

It is an interprime number because it is at equal distance from previous prime (2019223) and next prime (2019257).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 25521 + ... + 25599.

It is an arithmetic number, because the mean of its divisors is an integer number (70200).

2^2019240 is an apocalyptic number.

2019240 is a gapful number since it is divisible by the number (20) 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 2019240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3369600).

2019240 is an abundant number, since it is smaller than the sum of its proper divisors (4719960).

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

2019240 is a wasteful number, since it uses less digits than its factorization.

2019240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2019240 is about 1420.9996481351. Note that the first 3 decimals coincide. The cubic root of 2019240 is about 126.3948310123.

The spelling of 2019240 in words is "two million, nineteen thousand, two hundred forty".