1851791200 has 144 divisors (see below), whose sum is σ = 5333658624. Its totient is φ = 614361600.

The previous prime is 1851791177. The next prime is 1851791209. The reversal of 1851791200 is 21971581.

It is a happy number.

1851791200 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851791209) 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 23 ways as a sum of consecutive naturals, for example, 168267 + ... + 178933.

It is an arithmetic number, because the mean of its divisors is an integer number (37039296).

Almost surely, 2^1851791200 is an apocalyptic number.

1851791200 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 1851791200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2666829312).

1851791200 is an abundant number, since it is smaller than the sum of its proper divisors (3481867424).

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

1851791200 is a wasteful number, since it uses less digits than its factorization.

1851791200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10725 (or 10712 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 1851791200 is about 43032.4435745868. The cubic root of 1851791200 is about 1227.9970928005.

The spelling of 1851791200 in words is "one billion, eight hundred fifty-one million, seven hundred ninety-one thousand, two hundred".