187840964 has 6 divisors (see below), whose sum is σ = 328721694. Its totient is φ = 93920480.

The previous prime is 187840963. The next prime is 187840969. The reversal of 187840964 is 469048781.

It can be written as a sum of positive squares in only one way, i.e., 178489600 + 9351364 = 13360^2 + 3058^2 .

It is not an unprimeable number, because it can be changed into a prime (187840963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23480117 + ... + 23480124.

It is an arithmetic number, because the mean of its divisors is an integer number (54786949).

Almost surely, 2^187840964 is an apocalyptic number.

It is an amenable number.

187840964 is a deficient number, since it is larger than the sum of its proper divisors (140880730).

187840964 is a wasteful number, since it uses less digits than its factorization.

187840964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46960245 (or 46960243 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 187840964 is about 13705.5085275958. The cubic root of 187840964 is about 572.7038501641.

The spelling of 187840964 in words is "one hundred eighty-seven million, eight hundred forty thousand, nine hundred sixty-four".