1863144988 has 24 divisors (see below), whose sum is σ = 3454021872. Its totient is φ = 876336384.

The previous prime is 1863144973. The next prime is 1863144989. The reversal of 1863144988 is 8894413681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863144989) 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, 160095 + ... + 171337.

It is an arithmetic number, because the mean of its divisors is an integer number (143917578).

Almost surely, 2^1863144988 is an apocalyptic number.

It is an amenable number.

1863144988 is a deficient number, since it is larger than the sum of its proper divisors (1590876884).

1863144988 is a wasteful number, since it uses less digits than its factorization.

1863144988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13701 (or 13699 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 1863144988 is about 43164.1632375748. The cubic root of 1863144988 is about 1230.5016985250.

The spelling of 1863144988 in words is "one billion, eight hundred sixty-three million, one hundred forty-four thousand, nine hundred eighty-eight".