187863812 has 6 divisors (see below), whose sum is σ = 328761678. Its totient is φ = 93931904.

The previous prime is 187863803. The next prime is 187863869. The reversal of 187863812 is 218368781.

It can be written as a sum of positive squares in only one way, i.e., 175933696 + 11930116 = 13264^2 + 3454^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23482973 + ... + 23482980.

It is an arithmetic number, because the mean of its divisors is an integer number (54793613).

Almost surely, 2^187863812 is an apocalyptic number.

It is an amenable number.

187863812 is a deficient number, since it is larger than the sum of its proper divisors (140897866).

187863812 is a wasteful number, since it uses less digits than its factorization.

187863812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46965957 (or 46965955 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 187863812 is about 13706.3420357147. The cubic root of 187863812 is about 572.7270694640.

The spelling of 187863812 in words is "one hundred eighty-seven million, eight hundred sixty-three thousand, eight hundred twelve".