187420660 has 96 divisors (see below), whose sum is σ = 465518592. Its totient is φ = 62052480.

The previous prime is 187420633. The next prime is 187420669. The reversal of 187420660 is 66024781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187420669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 981165 + ... + 981355.

It is an arithmetic number, because the mean of its divisors is an integer number (4849152).

Almost surely, 2^187420660 is an apocalyptic number.

187420660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187420660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232759296).

187420660 is an abundant number, since it is smaller than the sum of its proper divisors (278097932).

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

187420660 is a wasteful number, since it uses less digits than its factorization.

187420660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 187420660 is about 13690.1665439103. The cubic root of 187420660 is about 572.2763795511.

The spelling of 187420660 in words is "one hundred eighty-seven million, four hundred twenty thousand, six hundred sixty".