188897140 has 24 divisors (see below), whose sum is σ = 397464480. Its totient is φ = 75410208.

The previous prime is 188897131. The next prime is 188897147. The reversal of 188897140 is 41798881.

188897140 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 not an unprimeable number, because it can be changed into a prime (188897147) 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, 1431 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (16561020).

Almost surely, 2^188897140 is an apocalyptic number.

188897140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188897140 is an abundant number, since it is smaller than the sum of its proper divisors (208567340).

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

188897140 is a wasteful number, since it uses less digits than its factorization.

188897140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18591 (or 18589 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 188897140 is about 13743.9855937061. The cubic root of 188897140 is about 573.7752279495.

The spelling of 188897140 in words is "one hundred eighty-eight million, eight hundred ninety-seven thousand, one hundred forty".