187427990 has 16 divisors (see below), whose sum is σ = 342902160. Its totient is φ = 73741920.

The previous prime is 187427923. The next prime is 187427993. The reversal of 187427990 is 99724781.

187427990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187427993) 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, 153020 + ... + 154239.

It is an arithmetic number, because the mean of its divisors is an integer number (21431385).

Almost surely, 2^187427990 is an apocalyptic number.

187427990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

187427990 is a deficient number, since it is larger than the sum of its proper divisors (155474170).

187427990 is a wasteful number, since it uses less digits than its factorization.

187427990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307327.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 187427990 is about 13690.4342516956. The cubic root of 187427990 is about 572.2838400078.

The spelling of 187427990 in words is "one hundred eighty-seven million, four hundred twenty-seven thousand, nine hundred ninety".