209474874 has 48 divisors (see below), whose sum is σ = 535441920. Its totient is φ = 57918240.

The previous prime is 209474861. The next prime is 209474891. The reversal of 209474874 is 478474902.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22909 + ... + 30720.

It is an arithmetic number, because the mean of its divisors is an integer number (11155040).

Almost surely, 2^209474874 is an apocalyptic number.

209474874 is an abundant number, since it is smaller than the sum of its proper divisors (325967046).

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

209474874 is a wasteful number, since it uses less digits than its factorization.

209474874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53675 (or 53672 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 209474874 is about 14473.2468368366. The cubic root of 209474874 is about 593.8963360233.

The spelling of 209474874 in words is "two hundred nine million, four hundred seventy-four thousand, eight hundred seventy-four".