209416494 has 24 divisors (see below), whose sum is σ = 487214568. Its totient is φ = 59833200.

The previous prime is 209416463. The next prime is 209416517. The reversal of 209416494 is 494614902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355857 + ... + 356444.

It is an arithmetic number, because the mean of its divisors is an integer number (20300607).

Almost surely, 2^209416494 is an apocalyptic number.

209416494 is an abundant number, since it is smaller than the sum of its proper divisors (277798074).

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

209416494 is a wasteful number, since it uses less digits than its factorization.

209416494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712320 (or 712313 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 209416494 is about 14471.2298717144. The cubic root of 209416494 is about 593.8411585392.

The spelling of 209416494 in words is "two hundred nine million, four hundred sixteen thousand, four hundred ninety-four".