1801988312 has 32 divisors (see below), whose sum is σ = 3552562800. Its totient is φ = 855657600.

The previous prime is 1801988281. The next prime is 1801988317. The reversal of 1801988312 is 2138891081.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1801988312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801988317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49514 + ... + 77817.

Almost surely, 2^1801988312 is an apocalyptic number.

It is an amenable number.

1801988312 is a deficient number, since it is larger than the sum of its proper divisors (1750574488).

1801988312 is a wasteful number, since it uses less digits than its factorization.

1801988312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127427 (or 127423 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 1801988312 is about 42449.8328854190. The cubic root of 1801988312 is about 1216.8881348597. Note that the first 3 decimals are identical.

The spelling of 1801988312 in words is "one billion, eight hundred one million, nine hundred eighty-eight thousand, three hundred twelve".