187406540 has 12 divisors (see below), whose sum is σ = 393553776. Its totient is φ = 74962608.

The previous prime is 187406503. The next prime is 187406561. The reversal of 187406540 is 45604781.

187406540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×187406540² = 70242422469543200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 187406540.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685144 + ... + 4685183.

It is an arithmetic number, because the mean of its divisors is an integer number (32796148).

Almost surely, 2^187406540 is an apocalyptic number.

187406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187406540 is an abundant number, since it is smaller than the sum of its proper divisors (206147236).

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

187406540 is a wasteful number, since it uses less digits than its factorization.

187406540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370336 (or 9370334 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 187406540 is about 13689.6508355765. The cubic root of 187406540 is about 572.2620077000.

The spelling of 187406540 in words is "one hundred eighty-seven million, four hundred six thousand, five hundred forty".