1840320 has 140 divisors (see below), whose sum is σ = 6638544. Its totient is φ = 483840.

The previous prime is 1840313. The next prime is 1840327. The reversal of 1840320 is 230481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1840313) and next prime (1840327).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 1840293 and 1840302.

It is not an unprimeable number, because it can be changed into a prime (1840327) 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 19 ways as a sum of consecutive naturals, for example, 25885 + ... + 25955.

2^1840320 is an apocalyptic number.

1840320 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 1840320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3319272).

1840320 is an abundant number, since it is smaller than the sum of its proper divisors (4798224).

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

1840320 is an equidigital number, since it uses as much as digits as its factorization.

1840320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1840320 is about 1356.5839450620. The cubic root of 1840320 is about 122.5456167747.

The spelling of 1840320 in words is "one million, eight hundred forty thousand, three hundred twenty".