209040282 has 48 divisors (see below), whose sum is σ = 498521088. Its totient is φ = 62778240.

The previous prime is 209040281. The next prime is 209040283. The reversal of 209040282 is 282040902.

It is an interprime number because it is at equal distance from previous prime (209040281) and next prime (209040283).

It is not an unprimeable number, because it can be changed into a prime (209040281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17703 + ... + 27045.

It is an arithmetic number, because the mean of its divisors is an integer number (10385856).

Almost surely, 2^209040282 is an apocalyptic number.

209040282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 209040282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249260544).

209040282 is an abundant number, since it is smaller than the sum of its proper divisors (289480806).

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

209040282 is a wasteful number, since it uses less digits than its factorization.

209040282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9475 (or 9472 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 209040282 is about 14458.2254097797. The cubic root of 209040282 is about 593.4853379715.

The spelling of 209040282 in words is "two hundred nine million, forty thousand, two hundred eighty-two".