187128339340 has 24 divisors (see below), whose sum is σ = 393255782640. Its totient is φ = 74796808128.

The previous prime is 187128339337. The next prime is 187128339347. The reversal of 187128339340 is 43933821781.

It is not an unprimeable number, because it can be changed into a prime (187128339347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3379830 + ... + 3434749.

It is an arithmetic number, because the mean of its divisors is an integer number (16385657610).

Almost surely, 2^187128339340 is an apocalyptic number.

187128339340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187128339340 is an abundant number, since it is smaller than the sum of its proper divisors (206127443300).

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

187128339340 is a wasteful number, since it uses less digits than its factorization.

187128339340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815961 (or 6815959 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 187128339340 in words is "one hundred eighty-seven billion, one hundred twenty-eight million, three hundred thirty-nine thousand, three hundred forty".