209442030 has 32 divisors (see below), whose sum is σ = 574470144. Its totient is φ = 47872416.

The previous prime is 209442029. The next prime is 209442059. The reversal of 209442030 is 30244902.

It is a happy number.

209442030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 498462 + ... + 498881.

It is an arithmetic number, because the mean of its divisors is an integer number (17952192).

Almost surely, 2^209442030 is an apocalyptic number.

209442030 is an abundant number, since it is smaller than the sum of its proper divisors (365028114).

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

209442030 is a wasteful number, since it uses less digits than its factorization.

209442030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997360.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 209442030 is about 14472.1121471608. The cubic root of 209442030 is about 593.8652949881.

Adding to 209442030 its reverse (30244902), we get a palindrome (239686932).

The spelling of 209442030 in words is "two hundred nine million, four hundred forty-two thousand, thirty".