209470308 has 24 divisors (see below), whose sum is σ = 489054720. Its totient is φ = 69781920.

The previous prime is 209470291. The next prime is 209470333. The reversal of 209470308 is 803074902.

It is a super-2 number, since 2×209470308² = 87755619867229728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21198 + ... + 29466.

It is an arithmetic number, because the mean of its divisors is an integer number (20377280).

Almost surely, 2^209470308 is an apocalyptic number.

It is an amenable number.

209470308 is an abundant number, since it is smaller than the sum of its proper divisors (279584412).

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

209470308 is a wasteful number, since it uses less digits than its factorization.

209470308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387 (or 10385 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 209470308 is about 14473.0890966649. The cubic root of 209470308 is about 593.8920208671.

The spelling of 209470308 in words is "two hundred nine million, four hundred seventy thousand, three hundred eight".