187993330 has 32 divisors (see below), whose sum is σ = 389531520. Its totient is φ = 63991152.

The previous prime is 187993321. The next prime is 187993343. The reversal of 187993330 is 33399781.

187993330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1352401 + ... + 1352539.

It is an arithmetic number, because the mean of its divisors is an integer number (12172860).

Almost surely, 2^187993330 is an apocalyptic number.

187993330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

187993330 is an abundant number, since it is smaller than the sum of its proper divisors (201538190).

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

187993330 is an frugal number, since it uses more digits than its factorization.

187993330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 187993330 is about 13711.0659687714. The cubic root of 187993330 is about 572.8586566734.

The spelling of 187993330 in words is "one hundred eighty-seven million, nine hundred ninety-three thousand, three hundred thirty".