209670072 has 32 divisors (see below), whose sum is σ = 524983680. Its totient is φ = 69782240.

The previous prime is 209670049. The next prime is 209670077. The reversal of 209670072 is 270076902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209670077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9997 + ... + 22787.

It is an arithmetic number, because the mean of its divisors is an integer number (16405740).

Almost surely, 2^209670072 is an apocalyptic number.

It is an amenable number.

209670072 is an abundant number, since it is smaller than the sum of its proper divisors (315313608).

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

209670072 is a wasteful number, since it uses less digits than its factorization.

209670072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13483 (or 13479 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 209670072 is about 14479.9886740287. The cubic root of 209670072 is about 594.0807517556.

The spelling of 209670072 in words is "two hundred nine million, six hundred seventy thousand, seventy-two".