209141340 has 36 divisors (see below), whose sum is σ = 585909576. Its totient is φ = 55741152.

The previous prime is 209141329. The next prime is 209141381. The reversal of 209141340 is 43141902.

It is a self number, because there is not a number n which added to its sum of digits gives 209141340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111087 + ... + 112953.

It is an arithmetic number, because the mean of its divisors is an integer number (16275266).

Almost surely, 2^209141340 is an apocalyptic number.

209141340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209141340 is an abundant number, since it is smaller than the sum of its proper divisors (376768236).

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

209141340 is an equidigital number, since it uses as much as digits as its factorization.

209141340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 209141340 is about 14461.7198147385. The cubic root of 209141340 is about 593.5809603372.

The spelling of 209141340 in words is "two hundred nine million, one hundred forty-one thousand, three hundred forty".