187420172 has 48 divisors (see below), whose sum is σ = 364105728. Its totient is φ = 84015360.

The previous prime is 187420151. The next prime is 187420183. The reversal of 187420172 is 271024781.

It is a happy number.

187420172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140573 + ... + 141899.

It is an arithmetic number, because the mean of its divisors is an integer number (7585536).

Almost surely, 2^187420172 is an apocalyptic number.

It is an amenable number.

187420172 is a deficient number, since it is larger than the sum of its proper divisors (176685556).

187420172 is a wasteful number, since it uses less digits than its factorization.

187420172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 187420172 is about 13690.1487208869. The cubic root of 187420172 is about 572.2758828589.

The spelling of 187420172 in words is "one hundred eighty-seven million, four hundred twenty thousand, one hundred seventy-two".