187872540 has 24 divisors (see below), whose sum is σ = 526043280. Its totient is φ = 50099328.

The previous prime is 187872521. The next prime is 187872571. The reversal of 187872540 is 45278781.

187872540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 187872492 and 187872501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565545 + ... + 1565664.

It is an arithmetic number, because the mean of its divisors is an integer number (21918470).

Almost surely, 2^187872540 is an apocalyptic number.

187872540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187872540 is an abundant number, since it is smaller than the sum of its proper divisors (338170740).

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

187872540 is a wasteful number, since it uses less digits than its factorization.

187872540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131221 (or 3131219 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 187872540 is about 13706.6604247716. The cubic root of 187872540 is about 572.7359388047.

The spelling of 187872540 in words is "one hundred eighty-seven million, eight hundred seventy-two thousand, five hundred forty".