187861434 has 16 divisors (see below), whose sum is σ = 381331488. Its totient is φ = 61685712.

The previous prime is 187861433. The next prime is 187861477. The reversal of 187861434 is 434168781.

187861434 is digitally balanced in base 2, 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 (187861433) 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, 233257 + ... + 234060.

It is an arithmetic number, because the mean of its divisors is an integer number (23833218).

Almost surely, 2^187861434 is an apocalyptic number.

187861434 is an abundant number, since it is smaller than the sum of its proper divisors (193470054).

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

187861434 is a wasteful number, since it uses less digits than its factorization.

187861434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467389.

The product of its digits is 129024, while the sum is 42.

The square root of 187861434 is about 13706.2552872767. The cubic root of 187861434 is about 572.7246529072.

The spelling of 187861434 in words is "one hundred eighty-seven million, eight hundred sixty-one thousand, four hundred thirty-four".