187897740 has 24 divisors (see below), whose sum is σ = 526113840. Its totient is φ = 50106048.

The previous prime is 187897739. The next prime is 187897747. The reversal of 187897740 is 47798781.

187897740 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 (187897747) 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, 1565755 + ... + 1565874.

It is an arithmetic number, because the mean of its divisors is an integer number (21921410).

Almost surely, 2^187897740 is an apocalyptic number.

187897740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187897740 is an abundant number, since it is smaller than the sum of its proper divisors (338216100).

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

187897740 is a wasteful number, since it uses less digits than its factorization.

187897740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131641 (or 3131639 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 187897740 is about 13707.5796550668. The cubic root of 187897740 is about 572.7615453505.

The spelling of 187897740 in words is "one hundred eighty-seven million, eight hundred ninety-seven thousand, seven hundred forty".