1841240 has 32 divisors (see below), whose sum is σ = 4181760. Its totient is φ = 729600.

The previous prime is 1841237. The next prime is 1841249. The reversal of 1841240 is 421481.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7520 + ... + 7760.

It is an arithmetic number, because the mean of its divisors is an integer number (130680).

2^1841240 is an apocalyptic number.

1841240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1841240 is an abundant number, since it is smaller than the sum of its proper divisors (2340520).

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

1841240 is a wasteful number, since it uses less digits than its factorization.

1841240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1841240 is about 1356.9229897087. The cubic root of 1841240 is about 122.5660340909.

The spelling of 1841240 in words is "one million, eight hundred forty-one thousand, two hundred forty".