209274730 has 32 divisors (see below), whose sum is σ = 445357440. Its totient is φ = 69276480.

The previous prime is 209274697. The next prime is 209274731. The reversal of 209274730 is 37472902.

It is a super-3 number, since 3×209274730³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (209274731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49516 + ... + 53575.

It is an arithmetic number, because the mean of its divisors is an integer number (13917420).

Almost surely, 2^209274730 is an apocalyptic number.

209274730 is an abundant number, since it is smaller than the sum of its proper divisors (236082710).

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

209274730 is a wasteful number, since it uses less digits than its factorization.

209274730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103134.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 209274730 is about 14466.3309100822. The cubic root of 209274730 is about 593.7071285020.

The spelling of 209274730 in words is "two hundred nine million, two hundred seventy-four thousand, seven hundred thirty".