187990442988 has 24 divisors (see below), whose sum is σ = 443166476592. Its totient is φ = 62017465344.

The previous prime is 187990442977. The next prime is 187990442999. The reversal of 187990442988 is 889244099781.

187990442988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (187990442977) and next prime (187990442999).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80750745 + ... + 80753072.

It is an arithmetic number, because the mean of its divisors is an integer number (18465269858).

Almost surely, 2^187990442988 is an apocalyptic number.

It is an amenable number.

187990442988 is an abundant number, since it is smaller than the sum of its proper divisors (255176033604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

187990442988 is a wasteful number, since it uses less digits than its factorization.

187990442988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161503921 (or 161503919 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 69.

The spelling of 187990442988 in words is "one hundred eighty-seven billion, nine hundred ninety million, four hundred forty-two thousand, nine hundred eighty-eight".