187900940 has 24 divisors (see below), whose sum is σ = 396644640. Its totient is φ = 74769408.

The previous prime is 187900939. The next prime is 187900957. The reversal of 187900940 is 49009781.

It is a junction number, because it is equal to n+sod(n) for n = 187900894 and 187900903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20480 + ... + 28199.

It is an arithmetic number, because the mean of its divisors is an integer number (16526860).

Almost surely, 2^187900940 is an apocalyptic number.

187900940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187900940 is an abundant number, since it is smaller than the sum of its proper divisors (208743700).

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

187900940 is a wasteful number, since it uses less digits than its factorization.

187900940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48881 (or 48879 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 187900940 is about 13707.6963783124. The cubic root of 187900940 is about 572.7647968115.

The spelling of 187900940 in words is "one hundred eighty-seven million, nine hundred thousand, nine hundred forty".