187399842 has 16 divisors (see below), whose sum is σ = 428342592. Its totient is φ = 53542800.

The previous prime is 187399819. The next prime is 187399843. The reversal of 187399842 is 248993781.

187399842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (187399843) 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, 2230909 + ... + 2230992.

It is an arithmetic number, because the mean of its divisors is an integer number (26771412).

Almost surely, 2^187399842 is an apocalyptic number.

187399842 is an abundant number, since it is smaller than the sum of its proper divisors (240942750).

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

187399842 is a wasteful number, since it uses less digits than its factorization.

187399842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461913.

The product of its digits is 870912, while the sum is 51.

The square root of 187399842 is about 13689.4061960335. The cubic root of 187399842 is about 572.2551899789.

The spelling of 187399842 in words is "one hundred eighty-seven million, three hundred ninety-nine thousand, eight hundred forty-two".