187444485 has 24 divisors (see below), whose sum is σ = 329022720. Its totient is φ = 98703072.

The previous prime is 187444441. The next prime is 187444489. The reversal of 187444485 is 584444781.

It is not a de Polignac number, because 187444485 - 2⁶ = 187444421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 187444485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187444489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22809 + ... + 29918.

It is an arithmetic number, because the mean of its divisors is an integer number (13709280).

Almost surely, 2^187444485 is an apocalyptic number.

187444485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

187444485 is a deficient number, since it is larger than the sum of its proper divisors (141578235).

187444485 is a wasteful number, since it uses less digits than its factorization.

187444485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52817 (or 52814 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 187444485 is about 13691.0366663741. The cubic root of 187444485 is about 572.3006278686.

The spelling of 187444485 in words is "one hundred eighty-seven million, four hundred forty-four thousand, four hundred eighty-five".