187994172 has 24 divisors (see below), whose sum is σ = 447987456. Its totient is φ = 61331248.

The previous prime is 187994117. The next prime is 187994173. The reversal of 187994172 is 271499781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187994173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166098 + ... + 167225.

It is an arithmetic number, because the mean of its divisors is an integer number (18666144).

Almost surely, 2^187994172 is an apocalyptic number.

187994172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187994172 is an abundant number, since it is smaller than the sum of its proper divisors (259993284).

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

187994172 is a wasteful number, since it uses less digits than its factorization.

187994172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333377 (or 333375 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The square root of 187994172 is about 13711.0966738624. The cubic root of 187994172 is about 572.8595119276.

The spelling of 187994172 in words is "one hundred eighty-seven million, nine hundred ninety-four thousand, one hundred seventy-two".