187797540 has 48 divisors (see below), whose sum is σ = 600953472. Its totient is φ = 42925056.

The previous prime is 187797527. The next prime is 187797541. The reversal of 187797540 is 45797781.

It is a self number, because there is not a number n which added to its sum of digits gives 187797540.

It is not an unprimeable number, because it can be changed into a prime (187797541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223149 + ... + 223988.

It is an arithmetic number, because the mean of its divisors is an integer number (12519864).

Almost surely, 2^187797540 is an apocalyptic number.

187797540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187797540 is an abundant number, since it is smaller than the sum of its proper divisors (413155932).

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

187797540 is a wasteful number, since it uses less digits than its factorization.

187797540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447156 (or 447154 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 48.

The square root of 187797540 is about 13703.9242554824. The cubic root of 187797540 is about 572.6597152958.

The spelling of 187797540 in words is "one hundred eighty-seven million, seven hundred ninety-seven thousand, five hundred forty".