1845781212 has 48 divisors (see below), whose sum is σ = 4860374400. Its totient is φ = 540039360.

The previous prime is 1845781187. The next prime is 1845781229. The reversal of 1845781212 is 2121875481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237262 + ... + 244917.

It is an arithmetic number, because the mean of its divisors is an integer number (101257800).

Almost surely, 2^1845781212 is an apocalyptic number.

1845781212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1845781212 is an abundant number, since it is smaller than the sum of its proper divisors (3014593188).

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

1845781212 is a wasteful number, since it uses less digits than its factorization.

1845781212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482226 (or 482224 counting only the distinct ones).

The product of its digits is 35840, while the sum is 39.

The square root of 1845781212 is about 42962.5559295534. Note that the first 3 decimals coincide. The cubic root of 1845781212 is about 1226.6671648877.

The spelling of 1845781212 in words is "one billion, eight hundred forty-five million, seven hundred eighty-one thousand, two hundred twelve".