1791240 has 128 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 408320.

The previous prime is 1791221. The next prime is 1791247. The reversal of 1791240 is 421971.

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 1791240.

It is not an unprimeable number, because it can be changed into a prime (1791247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30331 + ... + 30389.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2^1791240 is an apocalyptic number.

1791240 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 1791240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

1791240 is an abundant number, since it is smaller than the sum of its proper divisors (4429560).

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

1791240 is a wasteful number, since it uses less digits than its factorization.

1791240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1791240 is about 1338.3721455559. The cubic root of 1791240 is about 121.4463852593.

The spelling of 1791240 in words is "one million, seven hundred ninety-one thousand, two hundred forty".