1863981802 has 16 divisors (see below), whose sum is σ = 2876825952. Its totient is φ = 905279760.

The previous prime is 1863981761. The next prime is 1863981809. The reversal of 1863981802 is 2081893681.

It is not an unprimeable number, because it can be changed into a prime (1863981809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44308 + ... + 75439.

It is an arithmetic number, because the mean of its divisors is an integer number (179801622).

Almost surely, 2^1863981802 is an apocalyptic number.

1863981802 is a deficient number, since it is larger than the sum of its proper divisors (1012844150).

1863981802 is a wasteful number, since it uses less digits than its factorization.

1863981802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119973.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1863981802 is about 43173.8555378136. The cubic root of 1863981802 is about 1230.6858936956.

The spelling of 1863981802 in words is "one billion, eight hundred sixty-three million, nine hundred eighty-one thousand, eight hundred two".