1818552840 has 64 divisors (see below), whose sum is σ = 5875329600. Its totient is φ = 447643392.

The previous prime is 1818552787. The next prime is 1818552877. The reversal of 1818552840 is 482558181.

It is a junction number, because it is equal to n+sod(n) for n = 1818552792 and 1818552801.

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 15 ways as a sum of consecutive naturals, for example, 581310 + ... + 584429.

It is an arithmetic number, because the mean of its divisors is an integer number (91802025).

Almost surely, 2^1818552840 is an apocalyptic number.

1818552840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818552840 is an abundant number, since it is smaller than the sum of its proper divisors (4056776760).

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

1818552840 is a wasteful number, since it uses less digits than its factorization.

1818552840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165766 (or 1165762 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 42.

The square root of 1818552840 is about 42644.4936656540. The cubic root of 1818552840 is about 1220.6054595742.

The spelling of 1818552840 in words is "one billion, eight hundred eighteen million, five hundred fifty-two thousand, eight hundred forty".