1840505540 has 48 divisors (see below), whose sum is σ = 4050224640. Its totient is φ = 701205120.

The previous prime is 1840505519. The next prime is 1840505549. The reversal of 1840505540 is 455050481.

It is a junction number, because it is equal to n+sod(n) for n = 1840505497 and 1840505506.

It is not an unprimeable number, because it can be changed into a prime (1840505549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101570 + ... + 118310.

It is an arithmetic number, because the mean of its divisors is an integer number (84379680).

Almost surely, 2^1840505540 is an apocalyptic number.

1840505540 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 1840505540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025112320).

1840505540 is an abundant number, since it is smaller than the sum of its proper divisors (2209719100).

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

1840505540 is a wasteful number, since it uses less digits than its factorization.

1840505540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17012 (or 17010 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 1840505540 is about 42901.1135053625. The cubic root of 1840505540 is about 1225.4973496246.

The spelling of 1840505540 in words is "one billion, eight hundred forty million, five hundred five thousand, five hundred forty".