187897612 has 72 divisors (see below), whose sum is σ = 410931360. Its totient is φ = 73543680.

The previous prime is 187897597. The next prime is 187897613. The reversal of 187897612 is 216798781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187897613) 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 in 23 ways as a sum of consecutive naturals, for example, 292812 + ... + 293452.

It is an arithmetic number, because the mean of its divisors is an integer number (5707380).

Almost surely, 2^187897612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187897612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205465680).

187897612 is an abundant number, since it is smaller than the sum of its proper divisors (223033748).

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

187897612 is a wasteful number, since it uses less digits than its factorization.

187897612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 698 counting only the distinct ones).

The product of its digits is 338688, while the sum is 49.

The square root of 187897612 is about 13707.5749861163. The cubic root of 187897612 is about 572.7614152913.

The spelling of 187897612 in words is "one hundred eighty-seven million, eight hundred ninety-seven thousand, six hundred twelve".