209104464 has 80 divisors (see below), whose sum is σ = 558089280. Its totient is φ = 67415040.

The previous prime is 209104433. The next prime is 209104487. The reversal of 209104464 is 464401902.

209104464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498847 + ... + 499265.

It is an arithmetic number, because the mean of its divisors is an integer number (6976116).

Almost surely, 2^209104464 is an apocalyptic number.

209104464 is a gapful number since it is divisible by the number (24) 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 209104464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279044640).

209104464 is an abundant number, since it is smaller than the sum of its proper divisors (348984816).

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

209104464 is a wasteful number, since it uses less digits than its factorization.

209104464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 209104464 is about 14460.4448064366. Note that the first 3 decimals coincide. The cubic root of 209104464 is about 593.5460713668.

The spelling of 209104464 in words is "two hundred nine million, one hundred four thousand, four hundred sixty-four".