187423980 has 144 divisors (see below), whose sum is σ = 587593440. Its totient is φ = 44476416.

The previous prime is 187423969. The next prime is 187423993. The reversal of 187423980 is 89324781.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 367966 + ... + 368474.

It is an arithmetic number, because the mean of its divisors is an integer number (4080510).

Almost surely, 2^187423980 is an apocalyptic number.

187423980 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 187423980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293796720).

187423980 is an abundant number, since it is smaller than the sum of its proper divisors (400169460).

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

187423980 is a wasteful number, since it uses less digits than its factorization.

187423980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 187423980 is about 13690.2877982897. The cubic root of 187423980 is about 572.2797586633.

It can be divided in two parts, 18742 and 3980, that added together give a palindrome (22722).

The spelling of 187423980 in words is "one hundred eighty-seven million, four hundred twenty-three thousand, nine hundred eighty".