187899312 has 20 divisors (see below), whose sum is σ = 485406680. Its totient is φ = 62633088.

The previous prime is 187899311. The next prime is 187899331. The reversal of 187899312 is 213998781.

187899312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 3914569 = 187899312 / (1 + 8 + 7 + 8 + 9 + 9 + 3 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (187899311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957237 + ... + 1957332.

It is an arithmetic number, because the mean of its divisors is an integer number (24270334).

Almost surely, 2^187899312 is an apocalyptic number.

187899312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187899312 is an abundant number, since it is smaller than the sum of its proper divisors (297507368).

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

187899312 is a wasteful number, since it uses less digits than its factorization.

187899312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914580 (or 3914574 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 187899312 is about 13707.6369954854. The cubic root of 187899312 is about 572.7631426353.

The spelling of 187899312 in words is "one hundred eighty-seven million, eight hundred ninety-nine thousand, three hundred twelve".