209234144 has 48 divisors (see below), whose sum is σ = 474012000. Its totient is φ = 89055744.

The previous prime is 209234093. The next prime is 209234161. The reversal of 209234144 is 441432902.

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, 30242 + ... + 36510.

It is an arithmetic number, because the mean of its divisors is an integer number (9875250).

Almost surely, 2^209234144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209234144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237006000).

209234144 is an abundant number, since it is smaller than the sum of its proper divisors (264777856).

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

209234144 is a wasteful number, since it uses less digits than its factorization.

209234144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435 (or 6427 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 209234144 is about 14464.9280675709. The cubic root of 209234144 is about 593.6687455346.

The spelling of 209234144 in words is "two hundred nine million, two hundred thirty-four thousand, one hundred forty-four".