1813840752 has 80 divisors (see below), whose sum is σ = 4846419968. Its totient is φ = 583960320.

The previous prime is 1813840729. The next prime is 1813840759. The reversal of 1813840752 is 2570483181.

It is a self number, because there is not a number n which added to its sum of digits gives 1813840752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813840759) by changing a digit.

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, 1089873 + ... + 1091535.

Almost surely, 2^1813840752 is an apocalyptic number.

1813840752 is a gapful number since it is divisible by the number (12) 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 1813840752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2423209984).

1813840752 is an abundant number, since it is smaller than the sum of its proper divisors (3032579216).

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

1813840752 is a wasteful number, since it uses less digits than its factorization.

1813840752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438 (or 2432 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1813840752 is about 42589.2093375775. The cubic root of 1813840752 is about 1219.5503027721.

The spelling of 1813840752 in words is "one billion, eight hundred thirteen million, eight hundred forty thousand, seven hundred fifty-two".