209494000 has 160 divisors (see below), whose sum is σ = 551304000. Its totient is φ = 76723200.

The previous prime is 209493983. The next prime is 209494007. The reversal of 209494000 is 494902.

It is a self number, because there is not a number n which added to its sum of digits gives 209494000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209494007) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1405926 + ... + 1406074.

It is an arithmetic number, because the mean of its divisors is an integer number (3445650).

Almost surely, 2^209494000 is an apocalyptic number.

209494000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209494000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275652000).

209494000 is an abundant number, since it is smaller than the sum of its proper divisors (341810000).

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

209494000 is a wasteful number, since it uses less digits than its factorization.

209494000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 209494000 is about 14473.9075580853. The cubic root of 209494000 is about 593.9144106105.

It can be divided in two parts, 209 and 494000, that added together give a square (494209 = 703²).

The spelling of 209494000 in words is "two hundred nine million, four hundred ninety-four thousand".