209601140 has 24 divisors (see below), whose sum is σ = 503043072. Its totient is φ = 71863200.

The previous prime is 209601121. The next prime is 209601149. The reversal of 209601140 is 41106902.

It is a happy number.

209601140 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 (209601149) 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, 748436 + ... + 748715.

It is an arithmetic number, because the mean of its divisors is an integer number (20960128).

Almost surely, 2^209601140 is an apocalyptic number.

209601140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209601140 is an abundant number, since it is smaller than the sum of its proper divisors (293441932).

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

209601140 is a wasteful number, since it uses less digits than its factorization.

209601140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497167 (or 1497165 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 209601140 is about 14477.6082278807. The cubic root of 209601140 is about 594.0156404714.

The spelling of 209601140 in words is "two hundred nine million, six hundred one thousand, one hundred forty".