209894982 has 32 divisors (see below), whose sum is σ = 473748480. Its totient is φ = 61410720.

The previous prime is 209894981. The next prime is 209894989. The reversal of 209894982 is 289498902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209894981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52918 + ... + 56745.

It is an arithmetic number, because the mean of its divisors is an integer number (14804640).

Almost surely, 2^209894982 is an apocalyptic number.

209894982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

209894982 is an abundant number, since it is smaller than the sum of its proper divisors (263853498).

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

209894982 is a wasteful number, since it uses less digits than its factorization.

209894982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109708.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 209894982 is about 14487.7528278198. The cubic root of 209894982 is about 594.2930964067.

The spelling of 209894982 in words is "two hundred nine million, eight hundred ninety-four thousand, nine hundred eighty-two".