209930472 has 48 divisors (see below), whose sum is σ = 581792640. Its totient is φ = 68348448.

The previous prime is 209930459. The next prime is 209930477. The reversal of 209930472 is 274039902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (209930477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30808 + ... + 36999.

It is an arithmetic number, because the mean of its divisors is an integer number (12120680).

Almost surely, 2^209930472 is an apocalyptic number.

It is an amenable number.

209930472 is an abundant number, since it is smaller than the sum of its proper divisors (371862168).

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

209930472 is a wasteful number, since it uses less digits than its factorization.

209930472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67862 (or 67855 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 209930472 is about 14488.9776036820. The cubic root of 209930472 is about 594.3265897806.

The spelling of 209930472 in words is "two hundred nine million, nine hundred thirty thousand, four hundred seventy-two".