209894484 has 24 divisors (see below), whose sum is σ = 492323328. Its totient is φ = 69597760.

The previous prime is 209894471. The next prime is 209894497. The reversal of 209894484 is 484498902.

It is an interprime number because it is at equal distance from previous prime (209894471) and next prime (209894497).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43497 + ... + 48080.

It is an arithmetic number, because the mean of its divisors is an integer number (20513472).

Almost surely, 2^209894484 is an apocalyptic number.

It is an amenable number.

209894484 is an abundant number, since it is smaller than the sum of its proper divisors (282428844).

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

209894484 is a wasteful number, since it uses less digits than its factorization.

209894484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91775 (or 91773 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 209894484 is about 14487.7356408792. The cubic root of 209894484 is about 594.2926263967.

The spelling of 209894484 in words is "two hundred nine million, eight hundred ninety-four thousand, four hundred eighty-four".